Modular Standard HP Chiller 1/4 screw compressor with ... · Modular Standard HP Chiller 1/4 screw compressor with Carel driver ... Overall defrosting of all pCO units connected to

Program for pCO¹ pCO2 and pCOC

Modular Standard HP Chiller 1/4 screw compressor with Carel driver

Manual version 1.0 – 25 September 2003

Program code: FLSTDmMSDE

Do we want you to save you time and money? We can assure you that reading this manual to the full will ensure correct installation and safe use of the product described here.

IMPORTANT WARNINGS

BEFORE INSTALLING OR CARRYING OUT ANY JOBS ON THE APPLIANCE, CAREFULLY READ AND FOLLOW THE

INSTRUCTIONS IN THIS MANUAL.

The appliance to which this software is dedicated was built to operate without risks for the intended purposes, providing: • software installation, programming, operational control and maintenance must be carried out by qualified personnel according to the

instructions in this manual; • all the conditions prescribed and contained in the installation and use manual of the application in question are observed. All uses other than this use and the making of modifications, not expressly authorised by the manufacturer, are considered improper. The user shall be exclusively responsible for injuries and damage caused through improper use.

CONTENT

1 APPLICATIONS AND FUNCTIONS PERFORMED BY THE SOFTWARE ........................................................................................ 3

2 THE USER TERMINAL............................................................................................................................................................................... 4

3 PLAN MANAGEMENT AMONG CARDS................................................................................................................................................. 6 3.1 HOW TO ASSIGN THE PLAN ADDRESSES ....................................................................................................................................... 6

4 INSTALLING DEFAULT VALUES............................................................................................................................................................ 7

5 SELECTING THE LANGUAGE ................................................................................................................................................................. 7

6 LIST OF INPUTS/OUTPUTS....................................................................................................................................................................... 8 6.1 CHILLER-ONLY UNIT - MACHINE TYPE “0” ................................................................................................................................... 8 6.2 CHILLER UNIT + HEAT PUMP – MACHINE TYPE “1”..................................................................................................................... 9 6.3 CHILLER UNIT WITH FREECOOLING – MACHINE TYPE “2” ..................................................................................................... 10 6.4 CHILLER-ONLY UNIT – MACHINE TYPE “3”................................................................................................................................. 11 6.5 CHILLER UNIT + HEAT PUMP WITH GAS REVERSING – MACHINE TYPE “4” ....................................................................... 12 6.6 CHILLER UNIT + HEAT PUMP WITH WATER REVERSING – MACHINE TYPE “5”................................................................. 13

7 LIST OF PARAMETERS ........................................................................................................................................................................... 14

8 SCREENS ..................................................................................................................................................................................................... 19 8.1 LIST OF SCREENS............................................................................................................................................................................... 19

9 ELECTRONIC EXPANSION VALVE...................................................................................................................................................... 20 9.1 DRIVER PARAMETERS...................................................................................................................................................................... 20 9.2 SPECIAL FUNCTION "IGNORE"........................................................................................................................................................ 21

10 CONTROL................................................................................................................................................................................................ 22 10.1 INLET TEMPERATURE CONTROL ............................................................................................................................................................ 22 10.2 OUTLET TEMPERATURE CONTROL......................................................................................................................................................... 23 10.3 CONTROL OF WATER /WATER CHILLER ONLY UNITS.............................................................................................................................. 23 10.4 CONTROL OF WATER/WATER CHILLER UNIT WITH GAS REVERSING HEAT PUMP....................................................................................... 24 10.5 CONTROL OF WATER/WATER CHILLER UNIT WITH WATER REVERSING HEAT PUMP.................................................................................. 24

11 TYPES OF CONTROLLED COMPRESSORS .................................................................................................................................... 25 11.1 STEPPED CAPACITY CONTROL............................................................................................................................................................... 25 11.2 STEPPED CAPACITY CONTROL WITH CONTROL AT INLET ........................................................................................................................ 26 11.3 STEPPED CAPACITY CONTROL WITH CONTROL AT OUTLET ..................................................................................................................... 26 11.4 CONTINUOUS CAPACITY CONTROL........................................................................................................................................................ 27 11.5 CONTINUOUS CAPACITY CONTROL WITH CONTROL AT OUTLET .............................................................................................................. 28

12 COMPRESSOR ROTATION ................................................................................................................................................................. 29

13 STARTING A SINGLE COMPRESSOR .............................................................................................................................................. 30 13.2 STARTING THE COMPRESSOR MOTOR .................................................................................................................................................... 30 13.3 COMPRESSOR START RESTRICTIONS...................................................................................................................................................... 30

14 FORCED CAPACITY CONTROL ........................................................................................................................................................ 31

15 SOLENOID-VALVE MANAGEMENT................................................................................................................................................. 32

16 PUMP-DOWN .......................................................................................................................................................................................... 32

17 CONDENSATION CONTROL .............................................................................................................................................................. 33 17.1 ON/OFF CONDENSATION LINKED TO OPERATION OF COMPRESSOR:...................................................................................................... 33 17.2 ON/OFF CONDENSATION LINKED TO PRESSURE OR TEMPERATURE SENSOR :........................................................................................ 33 17.3 MODULATING CONDENSATION LINKED TO PRESSURE OR TEMPERATURE SENSOR :.................................................................................. 33 17.4 PREVENT FUNCTION: ............................................................................................................................................................................ 33

18 DEFROSTING CONTROL FOR WATER/AIR MACHINES ............................................................................................................ 34 18.1 TYPES OF DEFROSTING ......................................................................................................................................................................... 34 18.2 TYPE OF DEFROSTING START/END......................................................................................................................................................... 34 18.3 DEFROSTING A CIRCUIT WITH TIME/TEMPERATURE CONTROL ................................................................................................................ 34 18.4 DEFROSTING A CIRCUIT WITH TIME/PRESSURE SWITCHES CONTROL ....................................................................................................... 34 18.5 OPERATION OF FANS DURING THE DEFROSTING STAGE .......................................................................................................................... 34

19 FREE COOLING CONTROL................................................................................................................................................................ 35 19.2 FREE COOLING ACTIVATION CONDITION ............................................................................................................................................... 35 19.3 FREE COOLING THERMOSTAT............................................................................................................................................................... 36 19.4 FREE COOLING DISABLING CONDITIONS................................................................................................................................................ 37 19.5 FREE COOLING ON/OFF VALVE .......................................................................................................................................................... 37 19.6 FREE COOLING ON/OFF VALVE WITH STEPPED CONDENSATION........................................................................................................... 38 19.7 FREE COOLING ON/OFF VALVE WITH INVERTER CONTROLLED CONDENSATION ................................................................................... 39 19.8 0-10 VOLT FREE COOLING ON/OFF VALVE ........................................................................................................................................ 40 19.9 0-10 VOLT FREE COOLING ON/OFF VALVE WITH STEPPED CONDENSATION ......................................................................................... 40 19.10 0-10 VOLT FREE COOLING VALVE WITH INVERTER CONTROLLED CONDENSATION................................................................................. 41

20 ALARMS .................................................................................................................................................................................................. 43 20.1 SERIOUS ALARMS................................................................................................................................................................................. 43 20.2 CIRCUIT ALARMS ................................................................................................................................................................................. 43 20.3 WARNING ONLY ALARMS ..................................................................................................................................................................... 43 20.4 PRESSURE DIFFERENTIAL ALARM MANAGEMENT................................................................................................................................... 43 20.5 ANTIFREEZE CONTROL ......................................................................................................................................................................... 44 20.6 PCO ALARMS TABLE ............................................................................................................................................................................ 45 20.7 DRIVER CARD ALARMS......................................................................................................................................................................... 45

21 ALARM LOG........................................................................................................................................................................................... 46 21.1 STANDARD LOG ................................................................................................................................................................................... 46 21.2 ADVANCED LOG................................................................................................................................................................................... 46 21.3 LIST OF ALARM LOG CODES .................................................................................................................................................................. 47 21.4 SHORT SUMMARY OF ALARMS COMING FROM DRIVER ........................................................................................................................... 48

22 SUPERVISOR .......................................................................................................................................................................................... 49

Standard Chiller/HP modulare per compressore a vite con driver CAREL

Cod.: +030221241 Rel. 1.0 dated 25 September 03 3

1 APPLICATIONS AND FUNCTIONS PERFORMED BY THE SOFTWARE Type of control unit

AIR / WATER CHILLER • Chiller only • Chiller + Heat pump • Chiller + Freecooling

WATER / WATER CHILLER • Chiller only • Chiller + Heat pump with gas reversing • Chiller + Heat pump with water reversing Type of control Proportional or proportional + integral control on the evaporator water inlet temperature probe. Time control of the neutral zone on the evaporator water outlet temperature probe. Types of compressors Screw compressors with 4 capacity control steps Screw compressors with continuous duty capacity control. Maximum number of compressors From 1 to 4 with a maximum of 4 capacity control steps (1 compressor for every pCO*) From 1 to 4 with continuous duty capacity control. (1 compressor for every pCO*) Compressor duty call rotation Rotation of all compressors to FIFO logic for stepped and continuous duty capacity control. Condensation Condensation can be performed according to temperature, pressure or ON/OFF Fan management in stepped mode or with 0/10 Volt proportional signal Type of defrosting Overall defrosting of all pCO units connected to network: Independent/Simultaneous/Separate Safety devices for all refrigerating circuits High pressure (pressure switch/transducer) Low pressure (pressure switch/transducer) Oil/Oil Level differential pressure switch Compressor thermal cutout Thermal cutout for condensation fan High delivery temperature to compressor Pressure differential alarm Antifreeze alarm System Safety devices Serious alarm input (shuts down entire unit) Flow-switch input for evaporator/condenser (shuts down entire unit) Pump thermal cutout input (shuts down entire unit) Remote ON/OFF input. Other functions Alarms logging Built-in terminal management (on pCO² only) Management of ratiometric probes for pressure control (on pCO1 only) EVD driver for piloting the EXV valve. Multilingual management. Accessories Supervision with serial card RS485 (CARE1 or MODBUS protocol)



2 THE USER TERMINAL The specified terminal has an LCD display (4 lines over 20 columns) and can be of two types: on board a built-in card with only 6 keys or external (connected by telephone cable) with 15 keys. All operations possible with the program can be carried out with both types. With the user terminal you can view the unit's operating conditions at all times and modify parameters. The terminal can be disconnected from the basic card - in fact it need not be present at all.

2.1.1 BELOW-KEY LEDS Three LEDs are located under the rubber keys of the EXTERNAL terminal, and four under the keys of the Built-in card. They respectively indicate the following: ON/OFF key (External display) When green the LED indicates that the unit is ON; it flashes in OFF status from the supervisor or

remote digital input ENTER key (External display) Yellow LED: the instrument is correctly powered ALARM key (common) Red LED - alarms are present ENTER key (Built-in display) Yellow LED: see ON/OFF Key (external display) PROG key (Built-in display) Green LED: you are in a branch of masks, other than the Menu ESC key (Built-in display) Green LED: you are in the Menu masks branch

2.1.2 EXTERNAL DISPLAY How to use the keys on the external terminal

Key Description

MENU

if pressed in all loops except Costr., you return to the main mask of the Menu (MU) branch if pressed in the Constructor loops, you return to the mask selected by the constructor The Menu branch displays the status of the unit, the reading of the control probes, and the current type of operation indicated by CH or HP (meaning chiller or heat pump respectively) in the bottom right corner).

SERVICING

Sends you to the first screen of the Maintenance loop (A0) The maintenance loop makes it possible to check the state of the devices and probes, and to maintain and adjust them, and to run the Manual procedure

PRINTER Temporary display of the pLAN address of the displayed card

INPUTS AND OUTPUTS

Sends you to the first mask of the I/O loop (I0) The I/O loop displays the state of the digital and analogue inputs and outputs

CLOCK Sends you to the first screen of the Clock loop (K0)

The clock loop is used for displaying / programming time and date

SET-POINT Sends you to the screen for setting the temperature set-points (SU)

The loop displays and sets also the winter operation set-point.

PROGRAM Sends you to the screen for inputting the user password (PU)

The user loop is used for displaying / programming the unit's parameters

+ MENU+PROG

Sends you to the mask for inputting the constructor's Password (ZU) The constructor loop enables configuration of type of unit and selection of connected devices and enabled functions.

INFO

If pressed in the shared terminal, it switches the displayed card

RED With the unit OFF, it enables winter operation in machine configurations 4 and 5.

BLUE With the unit OFF, it enables summer operation in machine configurations 4 and 5.



How to use the silicone rubber keys:

1. ON/OFF key: for switching the unit on and off. 2. ALARM key: to view the alarms on the display, cancel them and silence the

alarm buzzer 3. UP ARROW: has two functions: 1 it scrolls through the previous screens of the

same branch when the cursor is in home position; 2 it increases the value of a settings field, when the cursor is over that field; if a selection field is involved, if you press the arrow key, the previous associated text is shown

4. DOWN ARROW has two functions: 1 it scrolls through the next screens of the same branch when the cursor is in home position; 2 it reduces the value of a settings field, when the cursor is over that field; if a selection field is involved, if you press the arrow key, the next associated text is shown

5. ENTER key: this is used for moving the cursor between the home position and the settings or selection fields, and for saving the values of the set parameters after the cursor has exited the settings fields.

2.1.3 BUILT-IN DISPLAY

For advice on using keys Alarm, Up Arrow, Down Arrow, and Enter in the Built-in terminal, see the external terminal PRG + ENTER keys: temporary display of the pLAN address of the displayed card. POWER-UP: as there is no ON/OFF key, the unit is powered up and down by pressing the Esc+Enter keys simultaneously for 20 sec. After that, a screen appears from which the operation can be performed with the Enter key. SCREEN LOOP: as there are no keys which directly input in the mask loop, press the Prog key to show the loop list. Then use the arrow keys to locate in line with the selected loop and then press Enter to access it.

ALARM PROG ESC

UP DOWN ENTER

built-in terminal



3 PLAN MANAGEMENT AMONG CARDS

The pLAN network identifies a physical connection between the cards (pCO1 pCO2 or pCOC) and the external terminals. pLAN=pCO Local Area Network. The purpose of the pLAN network connection between the cards is to exchange variables among the cards with a logic decided by the program, in order to make the cards work together functionally. The variables exchanged among the cards have already been established by the program, and likewise their direction of origin and destination. Therefore, the user does not have to set them, but has only make the electrical connections.

3.1 HOW TO ASSIGN THE PLAN ADDRESSES The pLAN addresses are set with binary logic, changing the position of a group of dip-switches located at the back of the external terminals, on the pCO2 cards (see figure below) and inside the drivers of the electronic valves, with all the devices powered down. In pCO1, the address is numeric and is assigned in a different way from an external terminal.

3.1.1 pCO1 ADDRESSING Here is a description of the operations necessary for addressing pLAN from the pCO1 cards.

1. Power down the pCO1 card and connect an external terminal to the pLAN "0" address. 2. Power up the pCO1 card, by holding down the Alarm + Up keys until a mask appears 3. When the mask is shown, perform the indicated operations, i.e. insert the numeric (1,2,3…) pLAn address with the Up and Down keys

and then confirm by pressing Enter. 4. Power down the pCO1 card. 5. If necessary, assign the correct pLAN address to the external terminal if specified. 6. Power up the pCO1 card.

3.1.2 ADDRESSING PCO2, EXTERNAL TERMINALS AND VALVE DRIVERS The following are the addresses to be set on the pCO2 cards, external terminals and valve drivers. If you are using the pCO1 cards, consult the previous paragraph for the cards only, whereas the following information does apply to the terminals and drivers.

The main Menu mask indicated on the terminals shows the address of the connected card in the bottom left-hand corner. With the ind.16 terminal, all the cards can be controlled without any need for other terminals or in addition to them. In fact, the program enables the ind.16 terminal to access the parameters of all the connected cards, one at a time. To change over from one card to another, just press the info key. In all the other masks of the program, you can find out the address of the connected card by pressing the printer key.



4 INSTALLING DEFAULT VALUES When you have checked the connections between the cards and terminals, power up the pCO card/s* When the machine is powered up, the software automatically installs the default values selected by CAREL for all the chiller and driver configuration parameters. This section tells you how to reset default values to return to the initial conditions. Therefore, this operation need not be carried out at the first power-up. The following procedure is used for resetting all the in-plant configuration parameters selected by CAREL: ATTENTION! this procedure irreversibly cancels any programming done by the user As resetting the default values is an operation that concerns each pCO* card, if there are two or more cards, repeat the operation for each card. The procedure is identical for all the cards. These are the steps: • simultaneously press the "menu" and "prog" keys of the LCD terminal (when pressed, both the LED above the "menu" key and the LED

above the "prog" key should light up). • Input the password using the "arrow" keys and press Enter: in this way, you enter the "constructor" configuration : +--------------------+ ¦Constructor ¦ ¦Input password ¦ ¦ ¦ ¦ 0000 ¦ +--------------------+ • press the up arrow key to rapidly reach the default values installation screen: +--------------------+ ¦Delete memory V0¦ ¦Install global ¦ ¦default values S¦ ¦Please wait... ¦ +--------------------+ • press the "enter" key to position the cursor above the letter "N", and take it to "S" with the arrow keys. The "please wait…" words appear

immediately. They disappear after a few seconds. the default values have now been fully installed.

5 SELECTING THE LANGUAGE

When the unit is powered up, a screen appears by default, where you can select the language to be used (Italian/English - French/German). This mask stays active for 30 seconds. When this time has elapsed, the program automatically changes over to the main menu (M0 screen) This function can be disabled. How to disable it:

1. Go to the Program (P0 screen) branch 2. Type in the correct password. 3. Press the down arrow unit you reach the screen with reference "Pc" 4. Select "N" under item "Show language screen at start-up".

In any case, you can change the language in use at any time. To do this, go to the first screen of the "I/O" key (ref.10).



6 LIST OF INPUTS/OUTPUTS Inputs and outputs are listed below based on unit type. A number has been associated with each type of machine. This number is the program's main parameter because it identifies the inputs and outputs configuration. Using this list of inputs and outputs, select the number you require from the numbers associated in the program configuration screens. AIR/WATER UNIT WITH MAX. 4 SCREW COMPRESSORS (UP TO 4 CAPACITY STAGES PER COMPRESSOR)

6.1 CHILLER-ONLY UNIT - MACHINE TYPE “0” 6.1.1 DIGITAL INPUTS

Chiller-only unit MACHINE TYPE “0” N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM

Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Serious alarm (enablable) Serious alarm (enablable) Serious alarm (enablable) Serious alarm (enablable) Serious alarm (enablable) Serious alarm (enablable) 2 Evaporator Flow-switch

(enablable) Evaporator Flow-switch (enablable)

Evaporator Flow-switch (enablable)




3 Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Pump Thermal cutout Pump Thermal cutout Pump Thermal cutout 5 Low Pressure 2 Pressure-

switch Low Pressure 2 Pressure-switch

Low Pressure 2 Pressure-switch




6 Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout 10 Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout 11 High Pressure Pressure-

switch High Pressure Pressure-switch

High Pressure Pressure-switch




12 Compressor Thermal cutout Compressor Thermal cutout Compressor Thermal cutout Compressor Thermal cutout Compressor Thermal cutout Compressor Thermal cutout

6.1.2 ANALOGUE INPUTS Chiller-only unit MACHINE TYPE “0”

N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Water temperature at

Evaporator Inlet High Pressure High Pressure Water temperature at

Evaporator Inlet

2 Water temperature at Evaporator Outlet

Water temperature at Evaporator Outlet

Low Pressure Low Pressure Water temperature at Evaporator Outlet


3 Delivery Temperature Delivery Temperature Delivery Temperature Delivery Temperature Condenser Temperature Condenser Temperature 4 Voltage / Current / External

Set-point Voltage / Current

5 Condenser Temperature Condenser Temperature Water temperature at Evaporator Inlet

Voltage / Current / External Set-point

Voltage / Current

6 Voltage / Current / External Set-point

Voltage / Current Water temperature at Evaporator Outlet


Delivery Temperature Delivery Temperature

7 High Pressure High Pressure Condenser Temperature Condenser Temperature High Pressure High Pressure 8 Low Pressure Low Pressure Low Pressure Low Pressure

6.1.3 DIGITAL OUTPUTS


Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Circulation Pump Circulation Pump Circulation Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler 10 Antifreeze Heater Antifreeze Heater Antifreeze heater C 1 Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1 13 Fan 2 Fan 2 Fan 2 Fan 2 Fan 2 Fan 2

6.1.4 ANALOGUE OUTPUTS


Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller 2



6.2 CHILLER UNIT + HEAT PUMP – MACHINE TYPE “1” 6.2.1 DIGITAL INPUTS

Chiller unit + heat pump MACHINE TYPE “1” N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM







3 Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Pump Thermal cutout Pump Thermal cutout Pump Thermal cutout 5 Low Pressure Pressure-

switch 1 Low Pressure Pressure-switch 2

Low Pressure Pressure-switch 1




6 Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout 10 Summer / Winter Summer / Winter Summer / Winter 11 High Pressure Pressure-







6.2.2 ANALOGUE INPUTS


Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Water temperature at


Evaporator Inlet





3 Delivery Temperature Delivery Temperature Delivery Temperature Delivery Temperature Condenser Temperature Condenser Temperature 4 Voltage / Current / External

Set-point Voltage / Current

5 Condenser Temperature Condenser Temperature Water temperature at Evaporator Inlet


Voltage / Current





7 High Pressure High Pressure Condenser Temperature Condenser Temperature High Pressure High Pressure 8 Low Pressure Low Pressure Low Pressure Low Pressure



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Circulation Pump Circulation Pump Circulation Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler Liquid inj./Econ/Oil Cooler 10 Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 4-wayValve 4-wayValve 4-wayValve 4-wayValve 4-wayValve 4-wayValve 13 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 2 Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller



6.3 CHILLER UNIT WITH FREECOOLING – MACHINE TYPE “2” 6.3.1 DIGITAL INPUTS

Chiller unit with freecooling MACHINE TYPE “2” N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM







3 Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Pump Thermal cutout Pump Thermal cutout Pump Thermal cutout 5 Low Pressure 2 Pressure-

switch Low Pressure 2 Pressure-switch





6 Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout Fan 1 Thermal cutout 10 Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout Fan 2 Thermal cutout 11 High Pressure Pressure-











Evaporator Inlet





3 Delivery Temperature Delivery Temperature Delivery Temperature Delivery Temperature Outside Air Temperature 4 Water Temperature at

Freecooling Inlet Voltage / Current / External

Set-point Voltage / Current Water Temperature at

Freecooling Inlet

5 Outside Air Temperature Water temperature at Evaporator Inlet


Voltage / Current





7 High Pressure High Pressure Outside Air Temperature High Pressure High Pressure 8 Low Pressure Low Pressure Water Temperature at

Freecooling Inlet Low Pressure Low Pressure



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Circulation Pump Circulation Pump Circulation Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid solenoid C 2 Liquid Solenoid Liquid solenoid C 2 Liquid Solenoid Liquid solenoid C 2 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Fan 2 Fan 2 Fan 2 Fan 2 Fan 2 Fan 2 10 Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1 Fan 1 13 Freecooling ON/OFF Valve Freecooling ON/OFF Valve Freecooling ON/OFF Valve



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller Speed Controller 2 3-way Freecooling Valve 3-way Freecooling Valve 3-way Freecooling Valve



WATER/WATER UNIT WITH MAX. 4 SCREW COMPRESSORS (UP TO 4 CAPACITY STAGES PER COMPRESSOR)

6.4 CHILLER-ONLY UNIT – MACHINE TYPE “3” 6.4.1 DIGITAL INPUTS








3 Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Evaporator Pump thermal

Cutout Evaporator Pump thermal


Cutout

5 Low Pressure 2 Pressure-switch






6 Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level Differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Evaporator Flow-switch

(Enablable) Evaporator Flow-switch (Enablable)

Evaporator Flow-switch (Enablable)




10 Condenser Pump thermal Cutout

Condenser Pump thermal Cutout

Condenser Pump thermal Cutout

11 High Pressure Pressure-switch











Evaporator Inlet





3 Delivery Temperature Delivery Temperature Delivery Temperature Delivery Temperature Water Temperature at Condenser Inlet

4 Water temperature at Condenser Outlet

Water temperature at Condenser Outlet


Voltage / Current Water temperature at Condenser Outlet


5 Water Temperature at Condenser Inlet

Water temperature at Evaporator Inlet


Voltage / Current





7 High Pressure High Pressure Water Temperature at Condenser Inlet

High Pressure High Pressure

8 Low Pressure Low Pressure Water temperature at Condenser Outlet


Low Pressure Low Pressure



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Evaporator Pump Evaporator Pump Evaporator Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid solenoid C 2 Liquid Solenoid Liquid solenoid C 2 Liquid Solenoid Liquid solenoid C 2 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Liquid Inj. / Econ. / Oil

Cooler Liquid Inj. / Econ. / Oil Cooler

Liquid Inj. / Econ. / Oil Cooler




10 Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 Condenser Pump Condenser Pump Condenser Pump 13



Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 2



6.5 CHILLER UNIT + HEAT PUMP WITH GAS REVERSING – MACHINE TYPE “4” 6.5.1 DIGITAL INPUTS

Chiller unit + heat pump with gas reversing MACHINE TYPE “4” N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM

Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) 2 Evaporator Flow-switch






3 Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Evaporator Pump thermal



Cutout

5 Low Pressure Pressure-switch

Low Pressure Pressure-switch





6 Oil 1 differential / Oil Level Oil 2 differential / Oil Level Oil 1 differential / Oil Level Oil 2 differential / Oil Level Oil 1 differential / Oil Level Oil 2 differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Evaporator Flow-switch






10 Summer / Winter Summer / Winter Summer / Winter 11 High pressure pressure-

switch High pressure pressure-switch

High pressure pressure-switch









Evaporator Inlet














Voltage / Current












Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Evaporator Pump Evaporator Pump Evaporator Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Liquid Inj. / Econ. / Oil






10 Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 Condenser Pump Condenser Pump Condenser Pump 13 4-wayValve 4-wayValve 4-wayValve 4-wayValve 4-wayValve 4-wayValve






6.6 CHILLER UNIT + HEAT PUMP WITH WATER REVERSING – MACHINE TYPE “5” 6.6.1 DIGITAL INPUTS

Chiller + Heat pump with water reversing MACHINE TYPE "S" N. pCO2 MEDIUM pCO1 MEDIUM pCOC MEDIUM

Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) Serious alarm (Enablable) 2 Evaporator Flow-switch






3 Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF Remote ON/OFF 4 Evaporator Pump thermal



Cutout

5 Low Pressure Pressure-switch






6 Oil 1 differential / Oil Level Oil 2 differential / Oil Level Oil 1 differential / Oil Level Oil 2 differential / Oil Level Oil 1 differential / Oil Level Oil 2 differential / Oil Level 7 Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) Phase Monitor (enablable) 8 Double Set-point Double Set-point Double Set-point 9 Evaporator Flow-switch






10 Summer / Winter Summer / Winter Summer / Winter 11 High pressure pressure-

switch High pressure pressure-switch










Evaporator Inlet














Voltage / Current












Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) Master (Address 1) Slave (addresses 2/3/4) 1 Evaporator Pump Evaporator Pump Evaporator Pump 2 Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor Line Contactor 3 Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor Star Contactor 4 Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor Triangle Contactor 5 Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid Liquid Solenoid 6 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 Capacity Control Relay 1 7 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 Capacity Control Relay 2 8 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 Capacity Control Relay 3 9 Liquid Inj. / Econ. / Oil






10 Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater Antifreeze Heater 11 General Alarm General Alarm General Alarm General Alarm General Alarm General Alarm 12 Condenser Pump Condenser Pump Condenser Pump 13 4-way Valve 4-way Valve 4-way Valve 4-way Valve 4-way Valve 4-way Valve






7 LIST OF PARAMETERS The table below describes program parameters along with the following additional information: screen code (screens have a code in the top right corner) to make identifying the parameter easier (screen), factory setting, upper and lower limits of the range within which values can be effected, unit of measurement, and an empty column for writing the desired value. To find the parameter you are interested in on the terminal’s display, proceed as follows:

• Locate the parameter in the table below and the code of the screen it appears on • Using the list of screens (coming section) and screen code, call up the screen on the terminal

DESCRIPTION OF PARAMETER SCREEN MASTER

SLAVE FACTORY

VALUE USER

VALUE RANGE MEASU-

REMENT UNIT

Password inputting A3 M/S 1234 0 to 9999 Duty hours thresholds for evaporator pump A4 M 10 0 to 999 hours x 1000 Reset duty hours thresholds for evaporator pump A4 M N. N/Y Duty hours thresholds for condenser pump A5 M 10 0 to 999 hours x 1000 Reset duty hours thresholds for condenser pump A5 M N. N/Y Duty hours thresholds for compressor A6 M 10 0 to 999 hours x 1000 Reset compressor duty hours A6 M N. N/Y Adjustment of probe B1 A7 M/S 0 -9.9 to 9.9 Adjustment of probe B2 A7 M/S 0 -9.9 to 9.9 Adjustment of probe B3 A7 M/S 0 -9.9 to 9.9 Adjustment of probe B4 A7 M/S 0 -9.9 to 9.9 Adjustment of probe B5 A8 M/S 0 -9.9 to 9.9 Adjustment of probe B6 A8 M/S 0 -9.9 to 9.9 Adjustment of probe B7 A8 M/S 0 -9.9 to 9.9 Adjustment of probe B8 A8 M/S 0 -9.9 to 9.9 Enable compressor 1 A9 M S N/Y Enable compressor 2 A9 M S N/Y Enable compressor 3 A9 M S N/Y Enable compressor 4 A9 M S N/Y Cancel alarm log Aa M/S N. N/Y Adjustment mode for Driver 1 valve Ab M/S Automatic Aut-Man Number of steps for manual opening of Driver 1 valve Ab M/S 0 0 to 9999 Steps Adjustment mode for Driver 2 valve Ac M/S Automatic Aut-Man Number of steps for manual opening of Driver 2 valve Ac M/S 0 0 to 9999 Steps Manual release of Driver 1 at start-up Ad M/S No No-Yes Manual release of Driver 2 at start-up Ae M/S No No-Yes Inputting of new Maintenance password Af M/S 1234 0 to 9999

Hour setting K1 M/S current hour 0 to 23 Hours Minute setting K1 M/S current minutes 0 to 59 minutes Day setting K1 M/S current day 1 to 31 Month setting K1 M/S current month 1 to 12 Year setting K1 M/S current year 0 to 99

Summer set point S1 M/S 12.0 see P1 °C Winter set point S1 M 45.0 see P2 °C Second summer set-point S2 M 45.0 see P1 °C Second winter set point S2 M/S 45.0 see P2 °C M/S

User password inputting P0 M/S 1234 0 to 9999 Minimum limit of summer set point P1 M/S 7.0 -99.9 / 99.9 °C Minimum limit of summer set point P1 M 17.0 -99.9 / 99.9 °C Minimum limit of winter set point P2 M 40.0 -99.9 / 99.9 °C Minimum limit of winter set point P2 M 50.0 -99.9 / 99.9 °C Selection of control probe P3 M Input Input / Output Control with probe at evaporator input P4 M Prop. Prop./Prop+Int. Integration time P4 M 600 0 to 9999 seconds Control at output - summer forced power down P5 M 5.0 -99.9 / 99.9 °C Control at output - winter forced power down P5 M 47.0 -99.9 / 99.9 °C Control band P6 M 3.0 0 to 99.9 °C Neutral zone with modulating capacity control P7 M/S 1.0 0 to 99.9 °C



DESCRIPTION OF PARAMETER SCREEN MASTER SLAVE

FACTORY VALUE

USER VALUE

RANGE MEASU-REMENT

UNIT Delayed power up between pump and compressors P8 M 5 0 to 999 seconds Delayed power down of main pump P9 M 5 0 to 999 seconds Enable remote On/Off Pa M/S N. N/Y Enable On/Off from supervisor Pa M/S N. N/Y Enable summer / winter selection from digital input Pb M N. N/Y Enable summer / winter selection from supervisor Pb M N. N/Y Enable language mask start-up Pc M/S S N/Y Type of freecooling control Pd M/S Prop. Prop./Prop+Int. Integral time for freecooling management Pd M/S 150 0 to 9999 seconds Freecooling offset on set-point Pd M/S 5.0 0 to 99.9 °C Minimum freecooling delta Pe M/S 2.0 0 to 99.9 °C Maximum freecooling delta Pe M/S 10.0 0 to 99.9 °C Freecooling differential Pe M/S 4.0 2.0 to 99.9 °C Compressors delay in freecooling Pe M/S 5 0 to 500 minutes Minimum threshold for freecooling valve start Pf M/S 50 0 to 100 % Maximum threshold for freecooling valve opening Pf M/S 50 0 to 100 % Defrosting starts Pg M/S 2.0 -99.9 / 99.9 °C/bar Defrosting ends Pg M/S 12.0 -99.9 / 99.9 °C/bar Drip-off time Ph M/S 10 5 to 999 seconds Delayed defrosting start Ph M/S 1800 0 to 32000 seconds Maximum defrosting time Ph M/S 300 0 to 32000 seconds Cycle reversing configuration Pi M/S Comp. always

on Comp. always ON

Comp. OFF start of defr. Cmp. OFF end defr. Comp. OFF

start/end

Card identification number for supervision network Pj M/S 1 0 to 200 Card communication speed for supervision network Pj M/S 19200 1200 to 19200 bps Selection of communication serial network Pj M/S Carel Carel / Modbus New user password inputting Pk M/S 1234 0 to 9999

+

Constructor password inputting Z0 M/S 1234 0 to 9999 CONFIGURATION →

Unit configuration C1 M/S 0 0 to 5 Enable probe B1 C2 M/S Y (if pCO2)

N (if pCO1) Y (if pCOC)

N/Y

Enable probe B2 C2 M/S N. N/Y Enable probe B3 C2 M/S N. N/Y Enable probe B4 C2 M/S N. N/Y Enable probe B5 C2 M/S N (if pCO2)

Y (if pCO1) N (if pCOC)

N/Y

Enable probe B6 C2 M/S N. N/Y Enable probe B7 C2 M/S N. N/Y Enable probe B8 C2 M/S N. N/Y Generic probe generic configuration (B4 on pCO1, B5 on pCOC, B6 on pCO2)

C3 M/S None No Current Voltage external Set-point

Type of generic probe C3 M/S 0 - 1 V 0-1 V 0-10 V

4-20mA

Generic probe lower limit C4 M/S 0.0 -999.9 to 999.9 °C/V/A Generic probe upper limit C4 M/S 0.0 -999.9 to 999.9 °C/V/A Probe types for analogue inputs 1 and 2 (for pCO1 cards only)

C5 M/S 4-20mA 4-20mA / 0-5V

Type of delivery temperature probe C6 M/S Ntc Ntc / 4-20mA Delivery probe lower limit C6 M/S -30.0 -999.9 to 999.9 °C Delivery probe upper limit C6 M/S 150.0 0.0 to 999.9 °C High pressure probe lower limit C7 M/S 00.0 -99.9 to 99.9 bar High pressure probe upper limit C7 M/S 30.0 -99.9 to 99.9 bar Low pressure probe lower limit C8 M/S -0.5 -99.9 to 99.9 bar Low pressure probe upper limit C8 M/S 7.0 -99.9 to 99.9 bar Enable double set-point C9 M Disabled Disabled / Enabled Number of drivers present Ca M/S 0 0 to 2 Number of compressors present Ca M/S 1 1 to 4 Compressor rotation Ca M S N/Y Type of capacity control Cb M/S Steps Step/Modul. Number of steps per compressor Cb M/S 4 1 to 4 Enable starting restrictions Cc M/S N. N/Y




FACTORY VALUE

USER VALUE

RANGE MEASU-REMENT

UNIT Step 1 - Relay 1 logic Cd M/S ON OFF/ON Step 1 - Relay 2 logic Cd M/S OFF OFF/ON Step 1 - Relay 3 logic Cd M/S OFF OFF/ON Step 2 - Relay 1 logic Ce M/S OFF OFF/ON Step 2 - Relay 2 logic Ce M/S OFF OFF/ON Step 2 - Relay 3 logic Ce M/S ON OFF/ON Step 3 - Relay 1 logic Cf M/S OFF OFF/ON Step 3 - Relay 2 logic Cf M/S ON OFF/ON Step 3 - Relay 3 logic Cf M/S OFF OFF/ON Step 4 - Relay 1 logic Cg M/S OFF OFF/ON Step 4 - Relay 2 logic Cg M/S OFF OFF/ON Step 4 - Relay 3 logic Cg M/S OFF OFF/ON Enable step 1 special management Ch M/S N. N/Y Stand-by configuration for relay 6 Ci M/S OFF OFF/ON Stand-by configuration for relay 7 Ci M/S ON OFF/ON Reducing configuration for relay 6 Cj M/S ON OFF/ON Decrementing configuration for relay 7 Cj M/S ON OFF/ON Incrementing configuration for relay 6 Ck M/S OFF OFF/ON Incrementing configuration for relay 7 Ck M/S OFF OFF/ON Pulse period for modulating configuration Cl M/S 6 0 to 99 seconds Minimum decrementing pulse Cl M/S 1.5 0 to 99.9 seconds Maximum decrementing pulse Cl M/S 3.0 0 to 99.9 seconds Derivation time for modulating configuration Cm M/S 3 seconds Minimum decrementing pulse Cm M/S 1.5 0 to 99.9 seconds Maximum decrementing pulse Cm M/S 3.0 0 to 99.9 seconds Decrement forcing time at compressor start Cn M/S 20 0 to 999 seconds Enable solenoid forcing when compressor OFF Co M/S N. N/Y Enable pump - down Cp M/S N. N/Y Minimum pump - down time Cp M/S 50 0 to 999 seconds Configuration of compressor power level in case of forced capacity control.

Cq M/S Max. power Max. power / Min. power

Enable condensation Cr M/S No NO/YES Type of condensation control Cr M/S Inverter Inverter / Steps Number of fans per condenser Cr M/S 1 1 to 2 Enable clock card Cs M/S Disabled Disabled / Enabled

PARAMETERS → Starting restrictions - low pressure G0 M/S Starting restrictions - high pressure G0 M/S Starting restrictions - pressure equalisation G0 M/S Enable high pressure prevention G1 M/S N. N/Y Type of high condensation prevention G1 M/S Pressure Press / Temp Condensation set-point G1 M/S 20.0 0 to 99.9 bar/ °C High condensation differential G1 M/S 2.0 0 to 99.9 bar/ °C Enable delivery prevention G2 M/S N. N/Y Delivery prevention set-point G2 M/S 90.0 0 to 999.9 °C Delivery prevention differential G2 M/S 5.0 0 to 99.9 °C Antifreeze prevention set point G3 M/S 6.0 -99.9 to 99.9 °C Antifreeze prevention differential G3 M/S 1.0 0 to 99.9 °C Condensation set-point G4 M/S 14.0 -999.9 to 999.9 bar/ °C Condensation differential G4 M/S 2.0 -999.9 to 999.9 bar/ °C Inverter maximum speed G5 M/S 10.0 0.0 to 10.0 V Inverter maximum speed G5 M/S 3.0 0.0 to 10.0 V Maximum speed time G5 M/S 10 0 to 99 seconds Enable serious alarm G6 M/S N. N/Y Enable phase monitor alarm G6 M/S N. N/Y Enable evaporator flow-switch alarm G7 M/S N. N/Y Enable condenser flow-switch alarm G7 M/S N. N/Y Alarm set-point for delivery temperature probe G8 M/S 120.0 0 to 999.9 °C Alarm differential for delivery temperature probe G8 M/S 5.0 0 to 99.9 °C High pressure probe alarm set-point G9 M/S 21.0 0 to 99.9 bar High pressure probe alarm differential G9 M/S 2.0 0 to 99.9 bar Low pressure probe alarm set-point Ga M/S 1.0 -99.9 to 99.9 bar Low pressure probe alarm differential Ga M/S 0.5 -99.9 to 99.9 bar Alarm set-point: difference between high and low pressure Gb M/S 6.0 0 to 99.9 bar Delayed start due to low pressure difference alarm Gb M/S 20 0 to 999 seconds High voltage alarm set-point Gc M/S 440.0 0 to 999.9 V High voltage alarm differential Gc M/S 5.0 0 to 99.9 V High current alarm set-point Gd M/S 90.0 0 to 999.9 A High current alarm differential Gd M/S 5.0 0 to 99.9 A Antifreeze set point Ge M/S 3.0 0 to 999.9 °C Antifreeze differential Ge M/S 1.0 0 to 99.9 °C




FACTORY VALUE

USER VALUE

RANGE MEASU-REMENT

UNIT Pump status in case of antifreeze alarm Gf M Pump ON Pump ON /Pump OFF Solenoid-valve management set-point Gg M/S 80.0 0 to 999.9 °C Solenoid-valve management differential Gg M/S 10.0 0 to 99.9 °C Antifreeze heater set point Gh M/S 5.0 0 to 99.9 °C Antifreeze heater differential Gh M/S 1.0 0 to 99.9 °C Cycle reversing valve logic Gi M/S N.O. N.O. / N.C. Type of freecooling control Gi M/S 0/10V ON-OFF/0-10V Antifreeze temperature Gi M/S -2.0 -99.9 to 99.9 °C Defrosting probe configuration Cj M/S Pressure

switches Temperature

Pressure switches

Type of overall defrosting Cj M/S Simultaneous Simultaneous Separate

Independent

CAREL EXV DRIVERS → Driver 1 valve type F0 M/S Custom 0-11 (see page 8) Enable driver 1 battery F0 M/S N. N/Y Percentage relationship between Refrigerating power and Driver 1 power

F1 M/S 60 0 to 100 %

Driver 2 valve type F2 M/S Custom 0-11 (see page 8) Enable driver 2 battery F2 M/S N. N/Y Percentage relationship between Refrigerating power and Driver C2 power

F3 M/S 60 0 to 100 %

Driver 1 superheat set point during chiller operation F4 M/S 6.0 2.0 to 50.0 °C Driver 1 dead band during chiller operation F4 M/S 0 0 to 9.9 °C Driver 1 superheat set point during defrost. operation F5 M/S 6.0 2.0 to 50.0 °C Driver 1 dead band during defrost. operation F5 M/S 0 0 to 9.9 °C Driver 2 superheat set point during heat pump operation F6 M/S 6.0 2.0 to 50.0 °C Driver 2 dead band during heat pump operation F6 M/S 0 0 to 9.9 °C Driver 2 superheat set point during chiller operation F7 M/S 2.5 0.0 to 99.9 Driver 1 integral time during chiller operation F7 M/S 25 0 to 999 seconds Driver 1 derivative time during chiller operation F7 M/S 2.0 0.0 to 99.9 seconds Driver 2 proportional gain during defrost. operation F8 M/S 2.5 0.0 to 99.9 Driver 1 integral time during defrost. operation F8 M/S 25 0 to 999 seconds Driver 1 derivative time during defrost. operation F8 M/S 2.0 0.0 to 99.9 seconds Driver 2 proportional gain during heat pump operation F9 M/S 2.5 0.0 to 99.9 Driver 2 integral time during heat pump operation F9 M/S 25 0 to 999 seconds Driver 2 derivative time during heat pump operation F9 M/S 2.0 0.0 to 99.9 seconds Threshold for driver 1 low superheat protection during chiller operation.

Fa M/S 4.0 -4.0 to 10.0 °C

Integral time for driver 1 low superheat protection super heat in chiller operation

Fa M/S 1.0 0 to 25.5 seconds

Threshold for driver 1 low superheat protection during defrosting operation.

Fb M/S 4.0 -4.0 to 10.0 °C

Integral time for low alarm protection super heat driver 1 during defrost operation

Fb M/S 1.0 0 to 25.5 seconds

Threshold for driver 2 low super heat during pump operation

Fc M/S 4.0 -4.0 to 10.0 °C

Threshold integral time for driver 2 low super protection during heat pump operation

Fc M/S 1.0 0 to 25.5 seconds

Threshold for LOP protection during chiller operation Fd M/S -40.0 -70.0 to 50.0 °C Threshold Integral time for LOP protection during chiller. operation

Fd M/S 4.0 0 to 25.5 seconds

Threshold for LOP protection during heat pump operation Fe M/S -40.0 -70.0 to 50.0 °C Threshold integral time for LOP protection during heat pump operation

Fe M/S 4.0 0 to 25.5 seconds

Threshold for LOP protection during defrost. operation Ff M/S -40.0 -70.0 to 50.0 °C Integral time of threshold for LOP protection during defrost. operation

Ff M/S 4.0 0 to 25.5 seconds

Delayed start MOP protection during chiller operation Fg M/S 30 0 to 500 seconds Threshold for MOP protection during chiller operation Fg M/S 40.0 -50.0 to 99.9 °C Threshold Integral time for LOP protection during chiller. operation

Fg M/S 4.0 0 to 25.5 seconds

Delayed start MOP protection during heat pump operation Fh M/S 30 0 to 500 seconds Threshold for MOP protection during heat pump operation Fh M/S 40.0 -50.0 to 99.9 °C Threshold integral time for MOP protection during heat pump operation

Fh M/S 4.0 0 to 25.5 seconds

Delayed start MOP protection during chiller operation Fi M/S 30 0 to 500 seconds Threshold for MOP protection during chiller operation Fi M/S 40.0 -50.0 to 99.9 °C Threshold Integral time for LOP protection during chiller. operation

Fi M/S 4.0 0 to 25.5 seconds

Threshold for condensation high temperature protection during chiller operation

Fj M/S 75.0 0 to 99.9 °C




FACTORY VALUE

USER VALUE

RANGE MEASU-REMENT

UNIT Integral time of threshold for condensation high temperature protection during chiller operation

Fj M/S 4.0 0 to 25.5 seconds

Threshold for condensation high temperature protection during heat pump operation

Fk M/S 75.0 0 to 99.9 °C

Integral time of threshold for condensation high temperature protection during heat pump operation

Fk M/S 4.0 0 to 25.5 seconds

Threshold for condensation high temperature protection during defrost. operation

Fl M/S 75.0 0 to 99.9 °C

Integral time of threshold for condensation high temperature protection during defrost operation

Fl M/S 4.0 0 to 25.5 seconds

Threshold for intake high temperature during chiller operation

Fm M/S 30.0 0 to 100.0 °C

Threshold for intake high temperature during heat pump operation

Fn M/S 30.0 0 to 100.0 °C

Threshold for intake high temperature during defrost. operation

Fo M/S 30.0 0 to 100.0 °C

Type of refrigerant Fp M/S R407c R22 / R134a / R404a R407c / R410a / R507c R290 / R600 /

R600a R717R / 744

Custom Valve: minimum steps Fq M/S 0 0 to 8100 Custom Valve: maximum steps Fq M/S 1600 0 to 8100 Custom Valve: closing steps Fr M/S 3600 0 to 8100 Custom Valve: return steps Fr M/S 0 0 to 8100 Custom Valve: enable extra step at opening Fs M/S N. N/Y Custom Valve: enable extra step at closure Fs M/S N. N/Y Custom Valve: current operating Ft M/S 250 0 to 1000 mA Custom Valve: current stopped Ft M/S 100 0 to 1000 mA Custom Valve: frequency Fu M/S 100 32 to 330 Hertz Custom Valve: duty cycle Fu M/S 50 0 to 100 % Minimum value of evaporat. pressure probe Fv M/S -0.5 -9.9 to 10.0 Bar Maximum value of evaporat. pressure probe Fv M/S 7.0 3.5 to 200.0 Bar Delay low super heat alarm Fw M/S 0 0 to 3600 seconds Delay high temperature intake alarm Fw M/S 0 0 to 3600 seconds Delay LOP alarm Fx M/S 0 0 to 3600 seconds Delay MOP alarm Fx M/S 0 0 to 3600 seconds

TIMES → Delayed start due to evaporator flow-switch alarm T0 M/S 15 0 to 99 seconds Delayed steady state operation due to evaporator flow-switch alarm

T0 M/S 3 0 to 99 seconds

Delayed start due to condenser flow-switch alarm T1 M/S 15 0 to 99 seconds Delayed steady state operation due to condenser flow-switch alarm


Delayed start due to low pressure alarm T2 M/S 40 0 to 99 seconds Delayed steady state operation due to low pressure alarm


Delayed start due to oil differential alarm T3 M/S 120 0 to 999 seconds Delayed steady state operation due to oil differential alarm


Time between star / line T4 M/S 2 0 to 999 100 seconds Star time T4 M/S 200 0 to 999 100 seconds Delta / star time T4 M/S 1 0 to 999 100 seconds Compressor minimum ON Time / Time to reach minimum power


Compressor minimum OFF time T5 M/S 360 0 to 9999 seconds Time between power-ups of different compressors / Time to reach maximum power


Time between thrusts of same compressor T6 M/S 450 0 to 9999 seconds Time between solenoid/ capacity control 1 T7 M/S 10 0 to 9999 seconds Time between capacity controls 1 and 2 T7 M/S 25 0 to 9999 seconds Time between capacity controls 2 and 3 T7 M/S 300 0 to 9999 seconds Time between capacity controls 3 and 4 T7 M/S 300 0 to 9999 seconds

INITIALISATION → Deletion of memory and installation of default values. V0 M/S N. N/Y Set new Constructor password V1 M/S 1234 0 to 9999



8 SCREENS Screens can be divided into 5 categories:

• USER screens, not password protected: they appear in all loops except “prog” and “menu+prog” and show probe values, alarms, hours of operation of the devices, time and date, and can be used to set temperature and humidity set points and for clock set-up. They are marked with the “!” symbol in the parameters table below.

• password-protected USER screens (password 1234, editable): called up by pressing the “prog” key, via these screens you can set the main functions (times, set points, differentials) of connected devices. Screens referring to functions that are not available are not displayed. They are marked with the “"” symbol in the parameters table below.

• password-protected MAINTENANCE screens (password 1234, editable): called up by pressing the “maintenance” key. Via these screens you can monitor devices, set connected probes, edit hours of operation and manage devices in manual mode. They are marked with the “#” symbol in the parameters table below.

• password-protected MANUFACTURER screens (password 1234, editable): called up by pressing key combination “menu+prog” - via these screens you can configure the air-conditioner and enable main functions, as well as choosing connected devices. They are marked with the “$” symbol in the parameters table below.

8.1 LIST OF SCREENS Screens appearing on the display are listed below. The table’s columns represent screen loops, and the first screen (A0, B0…) is the one that appears when you press the relevant key. You can then use the arrow keys to scroll through the others. The codes (Ax, Bx, Cx…) appear in the top right corner of the screens, making them easier to identify. The meaning of the symbols !, "… is explained in the section above. The PSW symbol indicates screens where you are required to enter passwords.

+ ! M0 ! A0 ! I0 ! K0 ! S0 PSW P0 PSW Z0

! A1 ! I1 ! K1 ! S1 " P1 CONFIGURATION → # C1 ! A2 ! I2 ! S2 " P2 # C2 ! A3 ! I3 " P3 # C3 PSW A4 ! I4 " P4 # C4 $ A7 ! I5 " P5 # C5 $ A8 ! I6 " P6 # C6 $ A9 ! I7 " P7 # C7 $ Aa ! I8 " P8 # C8 $ Ab ! I9 " P9 ····· $ Ac ! Ia " Pa # Cr $ Ad ! Ib " Pb # Cs $ Ae ! Ic " Pc PARAMETES → # G0 $ Af ! Id " Pd # G1 ! Ie " Pe # G2 ! If " Pf # G3 ! Ig " Pg # G4 ! Ih " Ph # G5 ! Ii " Pi # G6 ! Ij " Pj # G7 ! Ik " Pk # G8 ····· # Gi # Gj CAREL EXV DRIVER → # F0 # F1 # F2 # F3 # F4 # F5 # F6 # F7 # F8 ····· # Fw # Fx TIMES → # T0 # T1 # T2 # T3 # T4 # T5 # T6 # T7 INITIALISATION → # V0 # V1



9 ELECTRONIC EXPANSION VALVE

The EV Driver module for piloting the electronic expansion valves (EEV) for the pLAN network, makes it possible to control intake superheating to enable the refrigerating unit to operate more efficiently and with greater versatility. We say efficiently, because by improving and stabilising the flow of refrigerant to the evaporator, we increases the system's overall performance, while guaranteeing safety (low pressure pressure switch less frequently tripped, fewer returns of liquid refrigerant to the compressor,…). Furthermore, if the EEV is correctly sized, use of condensation pressure (or evaporation pressure,) either floating or at low set point, considerably increases the system's efficiency, while ensuring lower energy consumption and greater refrigerating yield. It is versatile, because the electronic expansion valve makes it possible to serve refrigerating units with a lower refrigerating capacity and in operating conditions which may differ considerably from each other. Using an expansion valve entails the installation not only of the EVDriver and the expansion valve itself, but also of a temperature sensor and a pressure transducer, both located on the refrigerating side at the end of the evaporator (on the compressor's intake pipe). Consult the following diagram for a better understanding of the system's typical lay-out.

The priorities to be considered for optimal control of the refrigerating system: obtaining a high, constant refrigerating yield rather than very low, stable superheating. The heart of the control is a PID control with settable coefficients for superheating. These are the additional controls: LOW (Low superheating with integral time and adjustable threshold)

LOP (Low evaporation pressure, operating in transients only, with integral time and adjustable threshold)

MOP (High evaporation pressure with integral time and adjustable threshold) HiT cond (High condensation pressure, enablable only with the condensation pressure probe

read by pCO, with integral time and adjustable threshold)

The parameters table describes the control parameters with thresholds and default values. The table below explains the meaning of the VALVE TYPE parameter (see screens F1- F2):

PARAMETER VALUE TYPE OF CORRESPONDING VALVE 0 Alco EX5 – EX6 1 Alco EX7 2 Alco EX8 3 Sporlan SEI 0.5 - 11 4 Sporlan SEI 25 5 Sporlan SEI 50 – SHE 250 6 Danfoss ETS 50 7 Danfoss ETS 100 8 --- 9 Carel E2V**P

10 Carel E2V**A 11 Custom (other type of valve)

9.1 DRIVER PARAMETERS In this section, we shall explain the essential parameters of greatest interest for setting up the driver. The screen code (see chap. "PARAMETERS LIST") is used (in brackets) to describe these parameters, in order to help you find the appropriate parameter. Each pCO* card manages a maximum of two drivers. As they have the same configuration, this section illustrates the first driver's configuration only.

9.1.1 Valve Type and battery presence (F0) The type of valve and battery presence are set on this first screen. These are the possible valves:

• Alco (EX5, EX6, EX7, EX8) • Sporlan (SEI 0.5, SEI 1, SEI 2, SEI 3.5, SEI 6, SEI 8,5, SEH 100, SEH 175, SEH 250) • Danfoss (ETS50, ETS100) • Carel E2V • Custom valve (if none of the valves described above are the one used by the user).

9.1.2 EEV circ. percentage ratio (F1) This indicates the ratio, as a percentage, between the maximum refrigerating capacity of the circuit controlled by the EVDriver and the capacity obtainable through maximum opening of the expansion valve, under the same operating conditions. Operating conditions are all the system variables which influence the refrigerating yield of both the system and the valve (condensation temperature, subcooling, superheating, loss of load,….).

Condensor

EEV

Evaporator

Compressor

T probe

P probe

Motor connection

pLAN

EEV

Evaporator

T probe

P probe

Motor connection

pLAN



9.1.3 Super-heat set point in mode CH/HP/DF (F4/F5/F6) Set point for superheating control. We advise you not to use values below 3°C Superheating control dead band. Control is not enabled for temperatures in the range Sheat Set – SH Dead band and Sheat Set + SH Dead band For example, a dead band value of 1°C, with a set point of 5°C, means that superheating can vary from 4°C and 6°C without the control attempting to change it. The algorithm resumes controlling outside that range. We advise you not to use values of over 2°C Attention: Suffix -CH means that these parameters are used for chiller operation. These parameters must be configured also for heat pump and defrosting operation.

9.1.4 PID parameters in operation CH/HP/DF (F7/F8/F6) Constants used for PID control of the EVDriver. The respectively represent the following:

• Proportional gain • Integrating time constant • Derivative time constant

In this case too, the three types of operation must be configured.

9.1.5 Low super-heat threshold for operation CH/HP/DF (Fa/Fb/Fc) The low superheating threshold and relevant integral constant for activating the low superheating protection. This protection usually leads to the closing of the electronic valve. If the integral constant is zero, the protection is disabled. In this case too, the three types of operation must be configured.

9.1.6 LOP threshold in operation CH/HP/DF (Fd/Fe/Ff) The low intake pressure threshold and relevant integral constant for activating LOP protection. This protection usually leads to the opening of the electronic valve. If the integral constant is zero, the protection is disabled. In this case too, the three types of operation must be configured.

9.1.7 MOP threshold in operation CH/HP/DF (Fg/Fh/Fi) The high intake pressure threshold and relevant integral constant for activating MOP protection. This protection usually leads to the closing of the electronic valve. If the integral constant is zero, the protection is disabled. In this case too, the three types of operation must be configured.

9.1.8 High condensation temperature threshold in operation CH/HP/DF (Fj/Fk/Fl) The high condensation pressure threshold and relevant integral constant for activating the protection. This protection usually leads to the closing of the electronic valve. If the integral constant is zero, the protection is disabled. In this case too, the three types of operation must be configured.

9.1.9 Refrigerant (Fp) Type of refrigerant used in the unit:

9.1.10 Configuration of the evaporation pressure probe (Fv) This screen is used for setting the minimum and maximum values of the refrigerant pressure probe range at the outlet of the evaporator connected to the driver.

9.2 SPECIAL FUNCTION "IGNORE" +--------------------+ |Driver 1 status Ad| | | |Valve not shut | |Ignore? N | +--------------------+

There are three alarm conditions which prevent the driver from performing normal control (one of these is shown above ): • an open valve % during the last blackout, the valve was not shut completely • battery charge % the battery is not operating correctly or it is discharged or disconnected • EEPROM restart % malfunctioning EEPROM When one of these conditions is active, the following alarm appears: +--------------------+ |AL086 | |D1:Wait due error | |EEPROM/batt.rechg.or| |open valve | +--------------------+

With the "Ignore" function, these alarms can be ignored to enable the driver to control the valve (otherwise the driver would keep the valve shut).

ATTENTION! cancelling the alarms means ignoring them, and, therefore, we advise you to carefully check that the system is not damaged, is not malfunctioning or does not become unreliable (e.g.: if "recharge battery" is signalled, this probably means that the battery is not charged or not connected, etc. In the event of a blackout, this may not allow the valve to close. The valve would therefore stay shut even when the system restarts. If none of the three above alarms is present, the screen changes over to the next screen:

+--------------------+ ¦Driver 1 status Ad¦ ¦ ¦ ¦No fault ¦ ¦ ¦ +--------------------+



10 Control

There are two different modes for controlling the control thermostat: • Control according to the water temperature values measured by the probe located at the evaporator inlet. • Control according to the water temperature values measured by the probe located at the evaporator outlet.

In the first case, control is proportional based on the absolute value of the temperature measured by the probe; in the second case, neutral zone control is used, and is based on the period when of the temperature measured by the probe is maintained, beyond certain thresholds.

However, the choice of the control type depends on the type of compressor managed. If the controlled compressor is of the stepped capacity control type, in that case, both types of control can be used indifferently. If the controlled compressor is of the continuous capacity control type, in that case, control based on outlet temperature only can be used.

10.1 Inlet temperature control Inputs used: • Water temperature at evaporator inlet Parameters used: • Type of unit • Total number of compressors • Type of compressor capacity control • Number of Capacity Control Steps • Control set-point • Proportional band for control at inlet. • Type of control (proportional or proportional + integral) • Integration time (if the proportional + integral control is enabled) • Time between start-up and first capacity control • Time between first and second capacity control • Time between second and third capacity control • Time between third and fourth capacity control Outputs used : • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays

Evaporator Inlet Temperature

Control set point

Control band

1 3 2 4

The thermostatic control according to the values measured by the temperature probe at evaporator inlet, is based on proportional control.

According to the total number of configured compressors and capacity control steps per compressor, the set control band will be subdivided into a certain number of steps of equal amplitude. When the activation thresholds of the individual steps is exceeded, a different compressor or capacity control steps will be activated.

To determine the different activation thresholds, the following relations must be applied:

Total number of control steps : Total number of compressors * Number of capacity control/compressor steps Step proportional amplitude = Proportional control band / Total number of control steps Step activation thresholds = Control set-point + (Step proportional amplitude * Step sequential number [1,2,3…]



10.2 Outlet temperature control Inputs used: • Water temperature at evaporator outlet Parameters used: • Type of unit • Total number of compressors • Type of compressor capacity control • Number of capacity control steps • Control set-point • Control band for control at outlet • Delayed starting of compressor capacity control stages • Devices activation delay • Devices disablement delay • Summer limit of temperature at outlet (powers down all compressors without observing the disabling time) • Winter limit of temperature at outlet (powers down all compressors without observing the disabling time) Outputs used : • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays

Temperature at outlet

Request to disable compressors

Request to enable compressors

Set point Neutral band

Neutral zone

Point B Point A A neutral temperature zone is identified, based on the set set-point and band values. Temperature values between set-point and set-point + band (A < Temperature < B) will not cause enabling or disabling of the compressors. Temperature values exceeding set-point and set-point + band ( Temperature > point B) will not cause enabling of the compressors. Temperature values below set-point and set-point + band ( Temperature< point A) will not cause disabling of the compressors.

A temperature threshold, subdivided into summer and winter operation is also specified: the installed devices are unconditionally disabled above/below this threshold, in order to prevent the units producing too much cold/heat.

10.3 Control of water /water chiller only units Inputs used: • Water temperature at evaporator inlet • Water temperature at evaporator outlet • Water temperature at condenser inlet • Water temperature at condenser outlet Parameters used : • Type of unit • Total number of compressors • Type of compressor capacity control • Number of capacity control steps • Control set-point • Control band • Type of control (inlet - outlet) • Type of control at inlet (proportional - proportional + integral) • Integration time (if the proportional + integral control is enabled) • Delayed starting of compressor capacity control stages • Devices activation delay Outputs used : • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays

10.3.1 Description of operation : Activation of compressors is controlled by the water temperature measured by the probe located at evaporator inlet/outlet. No condensation fans are supplied because the condenser is water-cooled.



10.4 Control of water/water chiller unit with gas reversing heat pump Inputs used: • Water temperature at evaporator inlet • Water temperature at evaporator outlet • Water temperature at condenser inlet • Water temperature at condenser outlet Parameters used : • Type of unit • Total number of compressors • Type of compressor capacity control • Number of capacity control steps • Control set-point • Control band • Type of control (inlet - outlet) • Type of control at inlet (proportional - proportional + integral) • Integration time (if the proportional + integral control is enabled) • Delayed starting of compressor capacity control stages • Devices activation delay • Refrigerating circuit reversing valve logic Outputs used • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays • Refrigerating circuit reversing valve

10.4.1 Description of operation : Activation of compressors is controlled by the water temperature measured by the probe located at evaporator inlet/outlet. No condensation fans are supplied because the condenser is water-cooled. During the reversing of the refrigerator cycle, i.e. at changeover from refrigeration to heating and vice-versa, the evaporator and condenser functions are exchanged. In this mode, the refrigerating circuit is reversed, but the compressors are always controlled by the temperature at evaporator inlet/outlet.

10.5 Control of water/water chiller unit with water reversing heat pump Inputs used: • Water temperature at evaporator inlet • Water temperature at evaporator outlet • Water temperature at condenser inlet • Water temperature at condenser outlet Parameters used : • Type of unit • Total number of compressors • Type of compressor capacity control • Number of capacity control steps • Control set-point • Control band • Type of control (inlet - outlet) • Type of control at inlet (proportional - proportional + integral) • Integration time (if the proportional + integral control is enabled) • Delayed starting of compressor capacity control stages • Devices activation delay • Water circuit reversing valve logic Outputs used • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays • Water circuit reversing valve

10.5.1 Description of operation : Activation of compressors is controlled by the water temperature measured by the probe located at evaporator inlet/outlet. No condensation fans are supplied because the condenser is water-cooled. During the reversing of the refrigerator cycle, i.e. at changeover from refrigeration to heating and vice-versa, the evaporator and condenser functions are not exchanged. In this mode, the water circuit is reversed, and the compressors are controlled by the temperature at evaporator or condenser inlet/outlet according to the selected mode.



11 Types of controlled compressors

11.1 Stepped capacity control A maximum number of four compressors are managed, with a maximum of four capacity control steps each. Capacity control is achieved by three relay outputs which, when suitably commanded, short-circuit the refrigerant thrust by the compressor, varying its capacity and, therefore, the power input into the circuit.

11.1.1 Configuration of stepped capacity control relays The enabling sequence of the capacity control relays differs for each compressor. Therefore, the software has a facility for configuring the enabling sequence according to the needs of different compressor manufacturers. For multi-card systems: as several compressors are housed on the same machine, it is considered that the compressors controlled by each pCO are perfectly equal and, therefore, the capacity control configuration selected on board the master card also applies to the slave cards. The following table shows examples of the configuration of the dedicated digital outputs for the different power stages entered. The effective status of the digital output is indicated. The relation between the data in the table and the values set on the display. Closed = ON Open = OFF Default configuration :

% LOAD Relay 1 Relay 2 Relay 3 25% CLOSED OPEN OPEN 50% OPEN OPEN CLOSED 75% OPEN CLOSED OPEN 100% OPEN OPEN OPEN

Configuration example :

% LOAD Relay 1 Relay 2 Relay 3 25% OPEN CLOSED CLOSED 50% CLOSED CLOSED OPEN 75% CLOSED OPEN CLOSED 100% CLOSED CLOSED CLOSED

11.1.2 Stepped capacity control times Delays are specified for capacity control management. These delays can be set when the capacity controls are enabled. Such delays indicate the minimum operating time of a compressor at a given power stage. If the machine is enabled at maximum level request, these delays prevent a changeover from power level 0 to maximum level. Graph of times for capacity control in 4 steps:

T1 T2 T3

25%

50%

75%

100%

T4

11.1.3 Special management of capacity control first stage

A facility is provided for enabling special management of the first stage of capacity control, managing the compressor's special requirements when it is operating at low power. In general, the control entails the use of the first capacity control stage only at power-up and if temperature falls below the control set-point. When controlling the compressor, this type of control uses a reduced power modulation range, between the second and maximum power stages.

Management varies according to whether the compressor is in its starting or disabling stage. In both cases, you are recommended not work at 25% power for too long. • Starting: after being started, if the compressor does not receive any thermostatic request for changeover to the second capacity control stage,

the changeover is forced by the software after a time which can be set on the screen (T1). • Power-down: if a reduction in the power of the circuit is requested, power is controlled between the maximum and second capacity control

stage. Only if temperature drops below set-point value, the compressor is forced to operate according to the first capacity control stage for the set time (T1).

This special operating mode is enabled from the screen. If the first capacity control step is not enabled, it is treated as just any step. The compressor can operate at this power level for an infinite time.



11.2 Stepped capacity control with control at inlet A description of stepped capacity control of 4 compressors with four capacity control steps each:

Control set point

Evaporator inlet temperature Control band

C4P1

P2 P3 P4

C1P1

P2 P3 P4 C2P1

P2 P3 P4 C3P1

P2 P3 P4

All compressors and the relevant capacity control steps will be proportionally positioned in the band. Increasing temperature values will cause the control steps to be subsequently input. Each step will be input according to the set delay times. The compressors will be started at the first entered capacity control stage. If special management of the first capacity control stage was selected, control will be effected according to the description in the dedicated section. In any event, the times for the capacity controls will be applied as described.

11.3 Stepped capacity control with control at outlet A description of stepped capacity control of 4 compressors with four capacity control steps each:

11.3.1 Activation of compressors if the water temperature measured by the probe located at the evaporator outlet exceeds the threshold of Control Set-point + Control Band (Point B), the number of power stages will be increased - the power stages were input according to the set parameter known as "delay between power-up of different devices".

Evaporator Outlet Temperature

Point B Control set point

C4P1

P2 P3 P4 C1P1

P2 P3 P4 C2P1

P2 P3 P4

C3P1

P2 P3 P4

Time [s] Devices activation delay

The activation delay of the different devices is the same, without distinction of compressors and capacity control steps. The activation delay times for the capacity controls are considered only if the step activation delay is shorter than the set delays. In this way, the power increase speed of the compressor is reduced. If the difference between the times is too high, if there is a powered up, but not fully loaded compressor, the next compressor could be started.

11.3.2 Power-down of compressors If the water temperature measured by the probe located at the evaporator outlet is below the Control Set-point (Point A), the number of power stages will be reduced - power stages were input according to the set parameter known as "delay between power-downs of different devices".

Delayed disablement of devices

Forced power-down threshold

Evaporator outlet temperature Point A control set point

C4P1

P2 P3 P4 C1P1

P2P3P4

C2P1

P2P3P4 C3P1

P2 P3 P4

Time [s]

If temperature falls below the set forced power-down threshold, the compressors are powered down irrespective of the set delays, in order to prevent tripping the antifreeze alarm.



11.4 Continuous capacity control A maximum number of four compressors are managed, with continuous capacity control. The compressor's capacity is controlled by two relay outputs, which, when suitably controlled, enable compressor power to be increased or reduced, varying the capacity of the compression chamber. Compressor power is controlled by sending impulses to the outputs of the capacity control relays. These impulses command the compressor to be charged or discharged. These impulses are at a constant frequency, settable, and of variable duration between two minimum and maximum limits, also settable. As there is no acquisition regarding the absolute position of the compressor 's capacity control valve, and, consequently, as no direct verification is possible of the power percentage input in the circuit, a time based control is run. With this control, when a set time threshold is reached, the compressor is considered fully charged/discharged and thus control of the capacity control impulses is suspended.

Impulsecalculatedduration

Impulse period Impulse period Impulse period




Time [s]

11.4.1 Configuration of continuous capacity control relays The control method of the capacity control relays differs for each compressor. Therefore, the software has a facility for configuring the enabling sequence according to the needs of different compressor manufacturers. For multi-card systems: as several compressors are housed on the same machine, it is considered that the compressors controlled by each pCO are perfectly equal and, therefore, the capacity control configuration selected on board the master card also applies to the slave cards. The following table shows examples of the configuration of the dedicated digital outputs for the different power stages entered. The effective status of the digital output is indicated. The relation between the data in the table and the values set on the display. Closed = ON Open = OFF Default configuration :

Compressor behaviour Relay 1 Relay 2 Power reduction CLOSED CLOSED Power stand-by OPEN CLOSED Power increase OPEN OPEN The power stand-by configuration is taken on by the outputs when no variation of input power is requested, or if the maximum/minimum compressor power is reached, or because the water temperature measured by the probe located at evaporator outlet is inside the neutral control zone. For compressor charging /discharging, the digital outputs of the pCO card are commanded alternatively according to the stand-by and charge/discharge configuration, causing the dedicated relay to pulse.



11.5 Continuous capacity control with control at outlet Temperature control with compressors on continuous capacity control can occur only if control at outlet is selected, according to the temperature values measured by the probe located at evaporator outlet. To that end, further configuration parameters are input. They are specific for the particular type of compressor, and are added to those previously mentioned in the description of the special type of control. Parameters used : • Neutral zone for continuous capacity control • Impulse period • Charging impulse minimum duration • Charging impulse maximum duration • Discharging impulse minimum duration • Discharging impulse maximum duration • Forced discharge period at compressor power-up • Capacity control relay forcing enabled when compressor is OFF: Outputs used : • Compressor capacity control Relay 1 • Compressor capacity control Relay 2

B Control set point

A Forced power-down threshold

C D

Control band for control at outlet

E

Temperature at evaporator outlet

Compressors power-up

Modulated power increase Compressors

power-down

Modulated power reduction

11.5.1 Control of continuous capacity control according to points in the graph According to the set-point values, the control band with control at output and the neutral zone of compressors on continuous capacity control, points C, D and E are identified. If the water temperature measured by the probe located at evaporator outlet exceeds point E

Point E = Control Set-point + Control Band with Control at Outlet In this case, there is a request for the compressors to be powered up and for power to be increased according to the maximum duration charging impulses until compressor maximum charging time is reached. If the water temperature measured by the probe located at evaporator outlet is below point B

Point B = Control Set-point In this case, there is a request for the compressors to be discharged according to the maximum duration impulses until compressor maximum discharging time is reached and until possible power-down. If the water temperature measured by the probe located at evaporator outlet is within the range D-E/B-C Point D = Control Set-point + (Control Band with Control at Outlet – Neutral Zone for Continuous Capacity control Compressors) Point C = Point D - Neutral Zone for Continuous Capacity Control Compressors Then the power of the compressor will be increased/reduced by impulses of variable duration according to the values calculated within the minimum and maximum limits set for an infinite time.



11.5.2 Power-up of compressors (temperature above point E) The compressors are powered up in sequence at a rate calculated by the set time required to reach maximum power. As there is no absolute reference concerning the value of input power, as soon as it is started, the compressor performs a forced discharge cycle for a set time (capacity control relays energised continuously according to the power discharge configuration). Subsequently, the compressor power will be increased by maximum duration impulses.

11.5.3 Increase of compressor power When the maximum time limit for reaching maximum power is reached, a forced charging cycle is commanded for a time of 20% of the set threshold, then the compressor capacity control relays change to the power stand-by configuration. If the temperature remains in the power-up zone (beyond point E), every ten minutes a forced charging cycle is commanded with a duration of 20% of the time required to reach the maximum set power. In the case of multi-compressor units, the periodic forced charging cycle will be carried out by all powered up compressors which have reached maximum power.

11.5.4 Modulated increase of power (temperature in range between points D-E) The compressor's power is modulated in this temperature range, by applying charging impulses of variable duration to the capacity control relays (duration is calculated between the minimum and maximum values set according to the measured temperature values). For multi-compressor units, modulated increase of power will occur simultaneously for all powered up compressors.

11.5.5 Operation of compressor in neutral zone (temperature in range between points C-D) If the temperature value locates inside the neutral zone, the capacity control relays of all powered up compressors change to the power stand-by configuration, thus maintaining the power level that had been reached.

11.5.6 Modulated reduction of power (temperature in range between points C-B) The compressor's power is modulated in this temperature range, by applying discharging impulses of variable duration to the capacity control relays (duration is calculated between the minimum and maximum values set according to the measured temperature values). For multi-compressor units, modulated reduction of power will occur simultaneously for all powered up compressors.

11.5.7 Power-down of compressors (temperature below point B) The compressors are first of all discharged by applying maximum duration discharging impulses to the capacity control relays. The compressors are then powered down, by reducing the number of requested devices, at a rate equal to the time required to reach minimum set power. FIFO Rotation is applied, whereby the first powered up compressor is discharged and then powered down. Instead, if rotation is disabled, the last powered-up compressors is discharged and then powered down.

12 Compressor rotation Compressor calls are rotated in order to equal the number of duty hours and power-ups among the devices. Rotation follows the FIFO logic: the first compressor to be powered up is the first to be powered down. At the initial stage, there may be considerable differences in the on-duty hours of the compressors, however, the hours are very similar to each other in steady state. Rotation occurs only among compressors and not among capacity controls, and, in any case, this type of rotation operates only if the compressors have stepped capacity control. Rotation-free management • Power-up: C1,C2,C3,C4. • Power-down: C4,C3,C2,C1. FIFO rotation management (the first compressor to be powered up is the first to be powered down): • Power-up: C1,C2,C3,C4. • Power-down: C1,C2,C3,C4.



13 Starting a single compressor

13.1.1 Description of operation The start-up stages are described in the following graph

Thermostat

Liquid solenoid

Ventilating unit

Compressor

Delayed power-up

13.2 Starting the compressor motor 13.2.1 Delta / Star starting

Starting the motor is described in the following diagram

LineContactor

Starcontactor

Trianglecontactor

Star-line delay

Star duration

Delta/Star delay

13.2.2 Start-up with Part - Winding

To start the compressor with part-winding, you must reset the star and delta-star times, setting the desired part-winding time as the delta-star time. The outputs used are those of the line and triangle relays, used respectively as part-winding relays A and B.

Example: Star-line time 0/100 s Star Time 0/100 s Delta-star time 100/100 s for a part-winding time of 1 s.

13.3 Compressor start restrictions There are two start restricting methods. Both start the compressor directly with the triangle contactor, by-passing the star contactor. There is a single enablement for both cases:

1. Set high and low pressure thresholds exceeded 2. Set equalised pressure threshold exceeded (equalised pressure is the average pressure between high and low pressure measured by the

transducers).



14 Forced capacity control Inputs used • Water temperature at evaporator outlet • Compressor delivery temperature • Condensation pressure Parameters used • High delivery temperature prevention threshold • High delivery temperature prevention differential • High pressure prevention threshold • High pressure prevention differential • Antifreeze temperature prevention threshold Antifreeze temperature prevention differential • Forced selection of compressor at minimum/maximum power Outputs used • All compressor capacity control relays

14.1.1 Description of operation The compressor forced capacity control function prevents the unit from operating in abnormal conditions of pressure, refrigerated water temperature or condensation temperature, thus preventing any intervention by specific alarms. A parameter is provided for selecting the compressor operating mode if forced capacity control is enabled. The compressor can be taken to minimum/maximum power according to the selection when: • High delivery temperature threshold exceeded • High pressure threshold exceeded • Antifreeze temperature threshold exceeded

Compressor deliverytemperature

Delivery temperaturethresholdDifferential

Condensationpressure

Condensationpressure thresholdDifferential

Evaporator outlettemperature

Anti-freezetemperaturethreshold

Differential

14.1.2 Compressors with stepped capacity control For compressors with stepped capacity control, forced capacity control means that the compressor has to operate at minimum or maximum power according to selection.

14.1.3 Compressors with continuous capacity control. For compressors with continuous capacity control, forced capacity control means that the compressor has to operate in continuous charging or discharging mode according to selection.



15 Solenoid-valve management. Inputs used: • Compressor delivery temperature Parameters Used : • Solenoid-valve activation threshold • Solenoid-valve differential Outputs used : • Economizer solenoid-valve, oil-cooler, liquid-injection

15.1.1 Description of operation A digital output is provided for controlling an economizer solenoid-valve, oil-cooler and liquid injection. Activation is based on the delivery temperature values of the compressor read by the probe according to the following graph

Solenoid-valveactivation thresholdDifferential

Compressor deliverytemperature

DifferentialDelivery Alarmthreshold

16 Pump-down Inputs used • Low Pressure Pressure-switch Parameters used • Enable pump - down • Pump - down maximum duration Outputs used • Liquid Solenoid • Windings for compressor Line - Delta - Star • All compressor capacity control relays

16.1.1 Description of operation If enabled, pump-down occurs by the thermostat disabling the compressor. Pump-down duration can be set and can cease due to maximum time or due to the tripping of the high pressure pressure switch. If any alarm powers down the machine or even just the compressor, the pump-down finishes immediately. When the pump-down function operates, this forces the compressor to forced capacity control. For compressors with stepped capacity control, operation at minimum/maximum power is forced. For compressors with modulating capacity control, continuous discharging/charging of the compressor is forced.



17 Condensation control

Condensation can be performed in the following modes: • ON/OFF linked to compressor operation (without pressure transducers) • ON/OFF or modulating linked to reading by the pressure transducer (if the high pressure transducers were enabled) • ON/OFF or modulating linked to reading by the battery temperature probes (if the battery temperature probes were enabled) Inputs used: • high pressure probe B7 • battery temperature probe B3 Outputs used : • Fan 1 • Fan 2 • Speed control for fans AOUT 1 Parameters used : • Selection of condensation control None /pressure/temperature • Condensation set point • Condensation band • Number of fans • Enable prevent function • Prevent threshold • Prevent differential • Output voltage for inverter minimum speed • Output voltage for inverter maximum speed • Inverter speed-up time

17.1 ON/OFF Condensation linked to operation of compressor: Fan operation will solely depend on compressor operation: Compressor OFF = fan OFF Compressor ON = fan ON

17.2 ON/OFF Condensation linked to pressure or temperature sensor : Fan operation depends on compressor operation and on the value read by the pressure or temperature sensors according to a set point or to a band. When the pressure/temperature is lower than or equal to the set point, all fans are OFF, but when the pressure/temperature rises to set point + band, all fans are ON.

17.3 Modulating condensation linked to pressure or temperature sensor : With this type of condensation, the fans will be controlled through a 0/10 V analogue output, in proportion to demand by the pressure/temperature sensors. If the lower limit of the ramp is greater than 0 V, there will not be a proportional straight line, but, as in the first section of the graph, it will be below the set point-diff. by one step.

Set point

Condensation Pressure / Temperature

10 Volt

Prevention Threshold

Alarm ThresholdControl Band

17.4 Prevent function: This function can be selected under the constructor password, and is used to prevent circuits shutting down due to high pressure. With the compressor ON, when this threshold is reached, the compressor is capacity-control forced until pressure returns to below the set point - - a settable differential. With the compressor OFF, when this threshold is reached, the fans are capacity-control forced until pressure returns to below the set point - a settable differential.



18 Defrosting control for water/air machines

Inputs used: • battery B3 temperature (can be used as a pressure switch) • high pressure B7 • Input for defrosting pressure switch 1

Parameters used : • Inputs used for defrosting • Type of defrosting (simultaneous / separate/independent) • Type of defrosting start and finish (compressor behaviour) • defrosting start set point • defrosting stop set point • Defrosting delay time • Maximum defrosting time • Type of compressor operation during the refrigerating cycle reversing stage. • Drip-off time

Outputs used : • Compressor 1 • Cycle reversing solenoid-valve 1 • Fan.

18.1 Types of defrosting 18.1.1 Simultaneous

Only one circuit has to request entering the defrosting cycle for all circuits to forcibly enter defrosting. Circuits which do not need to defrost (temperature above defrosting stop set-point) stop and wait. As soon as all circuits finish defrosting, the compressors may restart on heat pump operation.

18.1.2 Separate The first pCO unit requesting defrosting begins to defrost, the other units - even if they request defrosting - wait (the heat pump continues to operate) until the first one finishes defrosting. All the units sequentially complete their defrosting cycle.

18.1.3 Independent The units can start defrosting at random, independently of each other. In this way, there may be several machine starting to defrost simultaneously.

18.2 Type of defrosting start/end Defrosting management can be controlled either by battery B3 temperature probe, or by the B7 high pressure probe. The user can select one of the two probes from the screen. The compressor can have four different types of behaviour in connection with start/end of defrosting. This makes it possible to protect the compressor against sudden cycle reversing, if necessary. Times are not considered in these compressor power-downs and power-ups. • None: The refrigerating cycle is reversed at inlet/outlet to/from the defrosting cycle occurs with the compressor ON. • Start of defrosting: The compressor is powered down by the reversal of the refrigerating cycle only at the inlet of the defrosting cycle. • End of Defrosting: The compressor is powered down by the reversal of the refrigerating cycle only at the outlet from the defrosting cycle. • Start/end of defrosting: The compressor is powered down by the reversal of the refrigerating cycle both at the inlet and outlet to/from the defrosting cycle.

18.3 Defrosting a circuit with time/temperature control

If the battery temperature/pressure remains below the defrosting start set point for a cumulative time equal to defrosting delay time, the circuit in question enters a defrosting cycle. • the system's refrigerating

capacity reaches maximum value

• the refrigerating circuit is reversed with the 4-way valve

• the fan in question goes OFF (if pressure probes are present)

The circuit leaves the defrosting cycle due to temperature/pressure (if battery temperature exceeds the defrosting stop set point) or due to maximum time if the defrosting cycle exceeds the set maximum time threshold.

18.4 Defrosting a circuit with time/pressure switches control control is exactly the same, with the difference that the status of the pressure switches is counted rather than temperature/pressure.

18.5 Operation of fans during the defrosting stage The fans are usually OFF during the defrosting cycle. They are activated only if the pressure probes were enabled and pressure exceeds the prevent threshold - in this way the unit is prevented from going into high pressure alarm status.

Temperature

Time [s]t1 t2 t3 Defrosting cycle

Set.start

Set.stop



19 Free Cooling Control Inputs used • Water temperature at evaporator outlet • Water temperature at inlet of Free Cooling battery • Outside air temperature Parameters used • Type of unit • Number of units • Type of condensation • Number of fans • Free Cooling valve type • Free Cooling type control • Integration time • Control set point • Control set point offset • Minimum Free Cooling Delta • Maximum Free Cooling Delta • Free Cooling Control differential • Maximum threshold for Free Cooling valve opening • Minimum threshold for condensation speed controller • Free Cooling antifreeze threshold • Compressor activation delay

Outputs used • Condensation fans • Condensation fans speed controller • Free Cooling ON/OFF valve • Free Cooling 3-way valve

19.1.1 Description of operation

Free Cooling control makes it possible to exploit the temperature conditions of external air to facilitate cooling use water. To this end, a heat exchanger is supplied. If necessary, a certain quantity of water is returned to this exchanger by the system, deviated via an appropriately commanded valve. The favourable conditions of outside air cause the water to cool beforehand, and, therefore activation of the cooling devices is delayed. Free Cooling is available in the air/water unit in the internal Free Cooling mode only. i.e. with the Free Cooling battery housed inside the machine near the condensation battery/ies, with which its shares control of the condensation fan/s.

BATTERIA DI CONDENSAZIONE = CONDENSATION BATTERY BATTERIA DI FREE COOLING = FREE COOLING BATTERY EVAPORATORE = EVAPORATOR

19.2 Free Cooling activation condition The entire Free Cooling procedure is based on a relationship between the temperature value measured by the external temperature probe, and the temperature value measured by the temperature probe located at the input of the Free Cooling heat exchanger and the set Free Cooling delta.

External T. < Free Cooling Input T. – Free Cooling Delta

If this condition occurs, the control manages Free Cooling, enabling /disabling the dedicated devices.



19.3 Free Cooling Thermostat Free Cooling control exploits the calculated control set point values (taking into account any compensation) and the set Free Cooling control differential. The control is based on the water temperature measured by the probe located at the evaporator outlet, considering the effective supply of cold of the Free Cooling exchanger according to the different external temperature conditions. Two different control modes can be selected: proportional, proportional + integral - the integration constant must be set in the latter case.

The set point for thermostatic control of Free Cooling will be determined according to the nominal value of the temperature of the water you wish the unit to produce. According to the type of control adopted for compressor control (input - output), and as the temperature references are different, two distinct control graphs must be identified.

In machines controlled output with a neutral zone, the Free Cooling control set point will correspond to the control set point of the compressors. Free Cooling Set point = Compressors set Point

Free Cooling set point = Compressor set point T Out

Compressor Neutral zone

Free Cooling Control Band

The proportional control band will be equally distributed at the sides of the set point.

In machines controlled at output with a lateral proportional band, the Free Cooling control set point takes into account an offset with respect to the control set point of the compressors to compensate for the presence of the evaporating battery.

Free Cooling Set point = Compressors Set-point - Offset

Free Cooling set point T Out

Free Cooling Contro Band T In

Compressor Control Band

Compressor set point

Free Cooling set point Offset

The proportional control band will be equally distributed at the sides of the set point.

In the Free Cooling control band, the activation thresholds for dedicated devices (e.g. valves and fans or speed variators) will be calculated in different ways according to the type of selection. As the fans and/or speed variators are shared by Free Cooling control and condensation control, if one or more compressors in a given refrigerating circuit is/are enabled, priority will be given to condensation control to protect the circuit itself. The Free Cooling valve will, in any event, be maintained fully open to provide as high as possible a thermal yield even at minimum ventilating capacity. To optimise Free Cooling performance during the machine start transients and in steady state operating situations, a by-pass time is applied for thermostatic control of the compressors.



The purpose of this time is to delay the activation of the compressors in order to give Free Cooling sufficient time to reach the steady state conditions and take the machine's yield to nominal value. Only after this time has elapsed, and with the main thermostat dissatisfied, the compressors are commanded to operate. If time is set to 0, the function will be disabled. While the unit is operating, the same parameter is used by Free Cooling control to reassess the machine's working conditions according to the value measured by the external temperature probe. A further temperature delta should be set. This identifies a second threshold below which the yield of the Free Cooling battery is so high that it can fully satisfy the system's thermal load solely through combined operation of valve and fans. If the compressors are ON, the external temperature falls below "maximum delta" set according to the following relation:

External T. < Free Cooling Input T. – Free Cooling "Maximum Delta"

and this condition continues for a continuous time period equal to the set by-pass time for the compressors. When this time has elapsed, the compressors will be commanded to OFF followed by a changeover to pure Free Cooling operation to satisfy load requirements with minimum use of energy. When the by-pass time for thermostatic control of the compressors has again elapsed, the requests will be re-assessed. An antifreeze threshold is specified . It is based on the temperature value of external air to protect the heat exchanger when operating in a cold environment. If the temperature of external air is lower than the set threshold, the valve controlling water flow inside the Free Cooling exchanger will be commanded to open, and the main circulation pump will be enabled (if OFF). This pump moves the fluid and prevents the interior of the exchanger from freezing. If the valve is a 0-10V type, the degree of opening will depend on the unit's operating status.

• with the machine OFF, opening to 100% of capacity will be commanded • with the machine ON, opening to 10% of capacity will be commanded

If the valve is of the ON/OFF type, it will always open to maximum value irrespective of the unit's operating mode. The entire procedure will finish as soon as the external air temperature reaches a fixed hysteresis of 1.0°C with respect to the set threshold.

19.4 Free Cooling disabling conditions There are two main causes of the closure of the Free Cooling valve: the first depends on the external temperature conditions, and the second on thermostatic demand. The Free Cooling valve will close if the Free Cooling conditions stop.

External T. < Free Cooling Input T. – (Free Cooling Delta) + 1.5°C The Free Cooling valve will close if the Free Cooling thermostat is satisfied. For system safety, the reading of the water temperature probe a the evaporator outlet is checked. According to the set thresholds, the following will be processed: an antifreeze pre-alarm, which will enable any post-heating heaters and totally disable the Free Cooling devices; and an antifreeze alarm which will totally disable the unit. Other system safety devices : serious alarm from digital input, circulation pump thermal cutout, failed control probe, failed antifreeze control probe, evaporator flow-switch alarm, phase monitor alarm. These safety device will totally disabled the unit, and, therefore, stop the Free Cooling control.

19.5 Free Cooling ON/OFF valve

19.5.1 Proportional control


Free Cooling set point

Free Cooling Differential

Free Cooling ON/OFF valve

5,0 %

If temperature conditions favour Free Cooling control, the Free Cooling ON/OFF valve will be activated as soon as temperature exceeds the activation threshold of the individual step, identified by a temperature value of:

Control Set point - Free Cooling Differential +5.0% Free Cooling Differential The step amplitude is fixed at 5.0% of the set Free Cooling control differential.



19.5.2 Proportional + integral control




Free Cooling ON/OFF Valve

5 %

Free Cooling Differential 2

If temperature conditions favour Free Cooling control, the Free Cooling ON/OFF valve will be activated as soon as temperature exceeds the activation threshold of the individual step, identified by a temperature value of: Control Set point + 5.0% Free Cooling Differential The step amplitude is fixed at 5.0% of the Free Cooling control differential.

19.6 Free Cooling ON/OFF valve with stepped condensation 19.6.1 Proportional control


5.0 %

V1

V2

V3




Here is an example of Free Cooling control with ON/OFF valve and three condensation steps. The ON/OFF valve activation step will, in any case, be positioned in the first part of the control differential and will have an amplitude of 5.0% of the said differential. The activation steps of the condensation fans will be positioned proportionally inside the Free Cooling control differential. To calculate the amplitude of each step, use the following relation: Step amplitude = Free Cooling Differential (Number of Master fans X number of cards) It is assumed that all the circuits controlled by the pCO cards making up the system are equivalent and that the number of controlled devices is the same.





5.0 %

V1

V2

V3


Evaporator Outlet Temperature Free Cooling set point


Here is an example of Free Cooling control with ON/OFF valve and three condensation steps. The devices, whether they are valve or fans, will be activated in the second half of the control differential through the effect of the integrating control. Their activation will be tied to the set integrating constant: the slower it is, the greater the value attributed to the specific parameter. The amplitude of the valve control step will be 5.50% of the said control differential. The amplitude of the fan control steps will be calculated according to the following relation: Step amplitude = Free Cooling Differential (Number of Master fans X number of cards) It is assumed that all the circuits controlled by the pCO cards making up the system are equivalent and that the number of controlled devices is the same.

19.7 Free Cooling ON/OFF valve with inverter controlled condensation 19.7.1 Proportional control

Outlet Evaporator Temperature


5.0 %

0 Volt

10 Volt



Inverter Ramp 0 to10 V

The ON/OFF valve activation step will, in any case, be positioned in the first part of the control differential and will have an amplitude of 5.0% of the said differential. The proportional ramp for piloting the analogue control output of the condensation inverter will be calculated on the entire control differential. If necessary, Value 0-10 Volt can be further limited downward according to the minimum output voltage value set on the screen. All proportional outputs relating to the different units of the system will be piloted in parallel






5.0 %

0 Volt

10 Volt Free Cooling ON/OFF Valve


Inverter Ramp 0 to 10V


The devices, whether they are valve or fans, will be activated in the second half of the control differential through the effect of the integrating control. Their activation will be tied to the set integrating constant: the slower it is, the greater the value attributed to the specific parameter. The amplitude of the valve control step will be 5.50% of the said control differential. All proportional outputs relating to the different units of the system will be piloted in parallel

19.8 0-10 Volt Free Cooling ON/OFF valve The Free Cooling valve is proportionally commanded in a different way depending on whether condensation control is in steps or by inverter. The control diagrams of the two different situations are shown below.

19.9 0-10 Volt Free Cooling ON/OFF valve with stepped condensation 19.9.1 Proportional control

Free Cooling Set point

V1

V2

V3

0 Volt

10 Volt

Free Cooling Valve 0 to 10 V


Outlet Evaporator Temperature

The proportional control ramp of the Free Cooling valve will be calculated inside the first activation step of the condensation fans. In this way, when the first fan is enabled, the valve will be completely open, and, therefore, water flow in the Free Cooling battery (exchanger) will be at maximum level. The activation steps of the condensation fans will be positioned proportionally inside the Free Cooling control differential. To calculate the amplitude of each step, use the following relation: Step amplitude = Free Cooling Differential (Number of Master fans X number of cards) It is assumed that all the circuits controlled by the pCO cards making up the system are equivalent and that the number of controlled devices is the same.





V1

V2

V3

0 Volt

10 Volt





The devices, whether they are valve or fans, will be activated in the second half of the control differential through the effect of the integrating control. Their activation will be tied to the set integrating constant: the slower it is, the greater the value attributed to the specific parameter. The proportional control ramp of the Free Cooling valve will be calculated inside the first activation step of the fans. In this way, when the first fan is enabled, the valve will be completely open, and, therefore, water flow in the Free Cooling battery (exchanger) will be at maximum level. The activation steps of the fans will be positioned proportionally inside the Free Cooling control differential. To calculate the amplitude of each step, use the following relation: Step amplitude = Free Cooling Differential (Number of Master fans X number of cards) It is assumed that all the circuits controlled by the pCO cards making up the system are equivalent and that the number of controlled devices is the same.

19.10 0-10 Volt Free Cooling valve with inverter controlled condensation 19.10.1 Proportional control


valve maximum opening % threshold

inverter speed minimum % Threshold


0 Volt

10 Volt


Inverter Rampa0÷10 V

Free Cooling set point The control proportional ramp of the Free Cooling valve will be calculated inside the area determined by the thresholds: Control Set point -Free Cooling Differential/2 Control Set point -Free Cooling Differential/2 + valve maximum opening % Threshold The control proportional ramp of the condensation inverter will be calculated inside the area determined by the thresholds: Control Set point -Free Cooling Differential/2 + inverter speed minimum % Threshold Control Set point + Free Cooling Differential/2 The start/end points of the two control ramps can be modified at the user's discretion by varying the value of the thresholds (see graph) as a percentage of the value of the set Free Cooling differential. For the Free Cooling valve, the setting field ranges from 25 to 100% of the differential. For the condensation inverter, the setting field ranges from 0 to 75% of the differential.



Example Control set point 12.0ºC Free Cooling Differential 4.0ºC Free Cooling valve % threshold 40% Condensation inverter % threshold: 80% Proportional area for control of Free Cooling valve = 10.0 - 11.6 ºC Control Set point - Free Cooling Differential/2 = 10.0ºC Maximum % threshold for valve opening = 1.6ºC Proportional area for control of condensation inverter = 13.2 - 16.0 ºC Control Set point - Free Cooling Differential/2 = 10.0ºC Control Set point - Free Cooling Differential/2 + inverter speed minimum % Threshold = 13.2ºC



Valve opening max % threshold.

Inverter speed minimum % threshold


0 Volt

10 Volt

Valve 0 to 10V Free Cooling

Inverter Ramp 0 to 10 V

set point Free Cooling

Free Cooling differential 2

The devices, whether they are valve or fans, will be activated in the second half of the control differential through the effect of the integrating control. This activation will be constrained by the set integrative constant. The greater the value assigned to the integration time, the slower the system's response.



20 Alarms Alarms are divided into three categories Warning-only alarms (only warning on display and buzzer, warning on display, buzzer, alarm relay) Circuit alarms (only disable relevant circuit, warning on display, buzzer, alarm relay) Serious alarms (disable whole system, warning on display, buzzer, alarm relay)

20.1 Serious alarms • "No water flow" alarm • Alarm: evaporator antifreeze with manual reset • Serious alarm from digital input • Phase monitor alarm • Pump thermal cutout

20.2 Circuit alarms • High pressure/pressure switch alarm • Low pressure alarm • Compressor thermal overload alarm • Oil differential alarm • Fan thermal overload alarm • Unit disconnected from network alarm • Pressure differential alarm

20.3 Warning only alarms • Unit maintenance alarm • Compressor maintenance alarm • Clock card faulty or disconnected alarm •

20.4 Pressure differential alarm management Inputs used • Low pressure transducer • High pressure transducer Parameters used • Enable alarm • Pressure differential set-point • Alarm activation delay Outputs used • General alarm relays • All compressor outputs

20.4.1 Description of operation The alarm is based on the differential between high and low pressure probe readings If this differential drops below the set differential value, the alarm is signalled and the compressor is powered down, according to the set delay.



20.5 Antifreeze control Inputs used: • Water temperature at evaporator outlet • Water temperature at condenser outlet Parameters Used : • Enable evaporator outlet probe • Enable condenser outlet probe • Antifreeze heater set point • Antifreeze heater differential • Antifreeze alarm set point • Antifreeze alarm set point • Forcing of main pump due to antifreeze alarm Outputs used : • Antifreeze heater • General alarm relays • All compressor outputs • Main circulation pump

20.5.1 Description of operation Every pCO unit is able to manage antifreeze control providing the water temperature probe at evaporator/condenser outlet is connected and enabled according to the type of unit being controlled.

Antifreeze alarm set point

Antifreeze alarm differential

Antifreeze heater set point

Antifreeze heater differential

Activation of antifreeze alarm

Activation of antifreeze heater

Antifreeze control is always enabled, even if the machine is OFF, both in summer and winter operating modes. For type 5 machines with reversing of the water circuit, the antifreeze control always controls water temperature at evaporator outlet, shifting control to the evaporator or condenser according to the operating mode (summer-winter). The antifreeze alarms is a system alarm in multi-card systems. If present on any unit, it will totally shut down the machine. A control parameter is provided, which enables you to select whether to keep the main circulation pump ON or OFF in the event of an antifreeze alarm



20.6 pCO alarms table Code Alarm description OFF

Compressors

OFF Fans

OFF Pump

OFF System

Reset

Delay Separation

011 Serious Alarm * * * * Manual Mst/Slv 012 Phase Monitor Alarm * * * * Manual Mst/Slv 018 Evaporator Pump thermal Cutout * * * * Manual Mst 019 Condenser Pump thermal Cutout * * * * Manual Mst 013 Evaporator Flow-switch * * * * Manual Settable Mst/Slv 014 Condenser Flow-switch * * * * Manual Settable Mst/Slv 031 Antifreeze Alarm * * * Manual Mst/Slv 001 Unit 1 Offline * * * * Automatic 50 / 30 s Slv 002 Unit 2 Offline * * * * Automatic 50 / 30 s Mst 003 Unit 3 Offline * * * * Automatic 50 / 30 s Mst 004 Unit 4 Offline * * * * Automatic 50 / 30 s Mst 020 Compressor Thermal cutout * Manual Mst/Slv 015 Oil Differential Pressure Switch * * Manual Settable Mst/Slv 032 Low Pressure Differential * Manual Settable Mst/Slv 017 Low Pressure 2 Pressure-switch * * Manual Settable Mst/Slv 016 High Pressure Pressure-switch * * Manual Mst/Slv 034 Low Transducer Pressure * Manual Mst/Slv 033 High Transducer Pressure * * Manual Mst/Slv 021 Fan 1 Thermal cutout * Manual Mst/Slv 022 Fan 2 Thermal cutout * Manual Mst/Slv 036 High Voltage Manual Mst/Slv 037 High Current Manual Mst/Slv 051 Evap. Pump Maintenance Manual Mst 052 Cond. Pump Maintenance Manual Mst 053 Compressor Maintenance Manual Mst/Slv 060 B1 Probe Failed * * * * Automatic 10 s Mst 061 B2 Probe Failed * * * * Automatic 10 s Mst/Slv 062 B3 Probe Failed Automatic 10 s Mst/Slv 063 B4 Probe Failed Automatic 10 s Mst/Slv 064 B5 Probe Failed Automatic 10 s Mst/Slv 065 B6 Probe Failed Automatic 10 s Mst/Slv 066 B7 Probe Failed Automatic 10 s Mst/Slv 067 B8 Probe Failed Automatic 10 s Mst/Slv 041 32KB Clock Card Failed Manual Mst/Slv

20.7 Driver card alarms Code Alarm description OFF

Compressors

OFF Fans

OFF Pump

OFF System

Reset

Delay Separation

101 Diver 1 probe error * Manual Mst 102 Diver 1 EEPROM error * Manual Mst/Slv 103 Diver 1 stepped motor error * Manual Mst/Slv 104 Diver 1 battery error * Manual Mst/Slv 105 High pressure on driver 1 Manual Mst/Slv 106 Low pressure on driver 1 Manual Mst/Slv 107 Low super-heat * Manual Mst/Slv 108 Valve not shut while driver 1

being disabled * Manual Mst/Slv

109 Driver 1 high intake temperature

Manual Mst/Slv

110 standby due to EEPROM /battery recharge / or open valve error, driver 1

* Manual Mst/Slv

111 LAN disconnected, driver 1 * Manual Mst/Slv 201 Diver 2 probe status * Manual Mst/Slv 202 Diver 2 motor EEPROM error * Manual Mst/Slv 203 Diver 2 stepped motor error * Manual Mst/Slv 204 Diver 2 battery error * Manual Mst/Slv 205 High pressure on driver 2 Manual Mst/Slv 206 Low pressure on driver 2 Manual Mst/Slv 207 Low super-heat driver 2 * Manual Mst/Slv 208 Valve not shut while driver 2

disabled * Manual or Mst/Slv

209 Driver 2 high intake temperature

Manual Mst/Slv

210 standby due to EEPROM /battery recharge / or open valve error, driver 2

* Manual Mst/Slv

211 LAN disconnected, driver 2 * Manual Mst/Slv



21 Alarm log

The alarm log can store the standard chiller’s operating state when alarms are generated or at particular times. Each set of data stored is an event that can be viewed by selecting it from the list of logged events. The log proves useful when troubleshooting because a “snapshot” is taken of the system when the alarm occurs, which can later be used to help determine possible causes and how to remedy the trouble. There are two kinds of log in the program, the STANDARD log and ADVANCED log.

21.1 Standard log The pCO* boards’ considerable buffer space means events can be saved in the STANDARD log, which is always available on the various boards. If there is no clock card (optional extra on pCO1 and pCOC, built-in feature on pCO2), the STANDARD log just gives the alarm code. The maximum number of events that can be logged is 100. Once the hundredth alarm is reached, i.e. the last available slot in the memory is taken, the oldest alarm (00) is erased as it is overwritten with the next alarm, and so on for subsequent events. Logged events cannot be deleted by the user unless installing factory settings. The STANDARD log screen can be called up by pressing the MAINTENANCE key, and looks like this:

+--------------------+ ¦ Alarm log A2¦ ¦Event number 00¦ ¦Alarm code 000¦ ¦Date 00:00 00/00/00¦ +--------------------+

For each alarm, the following data are stored relating to the standard chiller at the time of the alarm:

• alarm code • time • date • chronological event number (0-99)

The chronological event number indicates the “seniority” of the event with respect to the 100 available storage slots. The alarm with number 00 is the first to occur after the STANDARD logs are enabled, and hence the oldest. If you move the cursor onto the chronological number, you can run through the alarm log, from 0 to 99, using the arrow keys. For instance, if you are on position 00, pressing the down arrow will not take you anywhere. If 15 alarms have been logged, for instance, and you are on position 014, pressing the up arrow will not take you anywhere.

21.2 Advanced log Events are logged on the 1MB or 2MB memory expansion module, which is a permanent appendix to the board. Advantages and features are listed below:

• Event-based log: a typical event-based log is the alarm log. When an alarm occurs, the alarm generated is stored along with significant data (temperatures, pressures, set points etc.).

• Time-based log: a typical event[sic! probably time]-based log is the temperatures/pressure log. Temperature and pressure values are stored at regular intervals.

• Log log: this is the log of the last alarms/temperatures/pressures stored before a serious alarm. Unlike data stored in the event- and time-based logs, these data are not overwritten when the memory is full.

• You have the option of choosing the values to be saved at any time as well as the method used to save them. Using the “WinLOAD” utility program, you can define the values to be saved and the method used to save them with the aid of a practical Wizard. WinLOAD does not need application software files as it can procure all the information required directly from the pCO1 – pCO2 board’s resident application software.

• 1MB of dedicated FLASH memory. With this system, data are saved to the 1MB FLASH memory included in the memory expansion module (code PCO200MEM0). By way of example, 1MB of memory can hold 5,000 alarm events with 5 values for each alarm, and 6 months of recording 2 values - for instance, temperature and pressure - saved every 5 minutes.

• Option of defining up to 7 different log configurations. Usually, each controller will have one alarm log and one log for control values (temperature/humidity/pressure) configured, in addition to a number of “log logs”.

• Stored data can be consulted either via the (separate or built-in) LCD terminal or via a connected PC. • “Black box” operating mode. The memory expansion module containing the logs can be removed from the controlled unit’s pCO² and

inserted in another pCO², via which the stored data can be consulted. The host pCO² does not need to contain the same software as the original.

• Stored data reliability. Data are saved to a FLASH memory that does not need batteries, which are liable to run down. If previously stored data are not compatible with new software following an upgrade, all data are erased (you are prompted to confirm first).



21.3 List of alarm log codes AL:001 Unit No. 1 Offline AL:002 Unit No. 2 Offline AL:003 Unit No.3 Offline AL:004 Unit No.4 Offline AL:011 Serious alarm from digital input AL:012 Phase monitor alarm AL:013 Evaporator flow-switch alarm AL:014 Condenser flow-switch alarm AL:015 Oil level alarm AL:016 High pressure alarm (pressure switch) AL:017 Low pressure alarm (pressure switch) AL:018 Evaporator Pump thermal Cutout AL:019 Condenser Pump thermal cutout AL:020 Compressor thermal cutout AL:021 Condenser 1 Thermal cutout AL:022 Condenser 2 Thermal cutout AL:031 Antifreeze alarm AL:032 Low pressure differential alarm AL:033 High pressure alarm (transducer) AL:034 Low pressure alarm (transducer) AL:035 High delivery temperature alarm AL:036 High voltage alarm AL:037 High current alarm AL:041 Alarm: clock card failed or disconnected AL:051 Evaporator pump maintenance AL:052 Condenser pump maintenance AL:053 Compressor Maintenance AL:060 Probe B1 failed or not connected AL:061 Probe B2 failed or not connected AL:062 Probe B3 failed or not connected AL:063 Probe B4 failed or not connected AL:064 Probe B5 failed or not connected AL:065 Probe B6 failed or not connected AL:066 Probe B7 failed or not connected AL:067 Probe B8 failed or not connected AL:101 Diver 1 probe status AL:102 Diver 1 EEPROM error AL:103 Diver 1 stepped motor error AL:104 Diver 1 battery error AL:105 High pressure (MOP) driver 1 AL:106 Low pressure (LOP) driver 1 AL:107 Low super-heat alarm, driver 1 AL:108 Valve not shut while driver 1 being disabled AL:109 Driver 1 high intake temperature AL:110 Standby due to EEPROM /battery recharge / or open valve error, driver 1 AL:111 LAN disconnected, driver 1 AL:201 Diver 2 probe error AL:202 Diver 2 EEPROM error AL:203 Diver 2 stepped motor error AL:204 Diver 2 battery error AL:205 High pressure (MOP) driver 2 AL:206 Low pressure (LOP) driver 2 AL:207 Low super-heat alarm, driver 2 AL:208 Valve not shut while driver 2 being disabled AL:209 Driver 2 high intake temperature AL:210 Standby due to EEPROM /battery recharge / or open valve error, driver 2 AL:211 LAN disconnected, driver 2



21.4 Short summary of alarms coming from driver • probe error (temperature and/or pressure probe malfunctioning or failed) • stepper motor error (valve motor connections fault) • EEPROM error (EEPROM reading or writing malfunction) • battery error (battery malfunction) • high pressure on EXV driver (operating pressure has exceeded max. MOP threshold) • high pressure on EXV driver (operating pressure has exceeded max. LOP threshold) • superheat low alarm (overheating alarm) • valve not closed during switch-off (valve not fully closed after last blackout) • high intake temperature alarm (operating temperature has exceeded max. threshold) • stand-by for error concerning EEPROM/battery charging or open valve (the system is blocked due to a problems at driver start-up - see the

special "ignore" function) • LAN disconnected (malfunction or fault in 4485 communication between pCO* and driver)



22 Supervisor The unit can be interfaced to a local or remote supervision/remote-assistance system. pCO card accessories include an optional card for serial communication through interface RS422 or RS485, supplied separately from the pCO card. If the serial communication values (serial address and communication speed) are correctly set, the parameters transmitted by the unit will be as shown on the following table.

22.1.1 Key A Analogue variables D Digital variables I Entire variable IN Input variables pCO Supervisor OUT Output variable pCO % Supervisor IN/OUT Input/output variable pCO Supervisor Type Direction Address Description

A OUT 1 Analogue input 1 value A OUT 2 Analogue input 2 value A OUT 3 Analogue input 3 value A OUT 4 Analogue input 4 value A OUT 5 Analogue input 5 value A OUT 6 Analogue input 6 value A OUT 7 Analogue input 7 value A OUT 8 Analogue input 8 value A OUT 9 Analogue output 1 value A OUT 10 Analogue output 2 value A IN/OUT 11 Summer temperature set-point A IN/OUT 12 Winter temperature set-point A IN/OUT 13 Condensation set-point A IN/OUT 14 Temperature control band I OUT 1 Status of unit I OUT 2 pLAN address of unit I IN/OUT 3 Type of fan management I IN/OUT 4 Unit configuration type I IN/OUT 5 Number of compressors I IN/OUT 6 Number of fans

D OUT 1 Status of unit D OUT 2 Digital output 1 value D OUT 3 Digital output 2 value D OUT 4 Digital output 3 value D OUT 5 Digital output 4 value D OUT 6 Digital output 5 value D OUT 7 Digital output 6 value D OUT 8 Digital output 7 value D OUT 9 Digital output 8 value D OUT 10 Digital output 9 value D OUT 11 Digital output 10 value D OUT 12 Digital output 11 value D OUT 13 Digital output 12 value D OUT 14 Digital output 13 value D OUT 15 Enable evaporator flow-switch alarm D OUT 16 Enable probe 1 D OUT 17 Enable probe 2 D OUT 18 Enable probe 3 D OUT 19 Enable probe 4 D OUT 20 Enable probe 5 D OUT 21 Enable probe 6 D OUT 22 Enable probe 7 D IN/OUT 23 Enable probe 8 D IN/OUT 24 ON/OFF from Supervisor D IN/OUT 25 Enable starting restrictions D IN/OUT 26 Type of compressor capacity control D OUT 27 Summer/Winter selection from digital input D OUT 28 D OUT 29 Summer/Winter operation D OUT 30 Selection of condensation with inverter D OUT 45 D OUT 46 Antifreeze alarm D OUT 47 Compressor thermal overload alarm D OUT 48 Evaporator flow-switch alarm D OUT 49 Condenser flow-switch alarm D OUT 50 High pressure alarm from pressure switch



Type Direction Address Description D OUT 51 Oil level alarm D OUT 52 Low pressure alarm from pressure switch D OUT 53 High pressure alarm from transducer D OUT 54 Serious alarm from digital input D OUT 55 Fan 1 thermal cutout alarm D OUT 56 Fan 2 thermal cutout alarm D OUT 57 Evaporator pump thermal cutout alarm D OUT 58 Card 1 offline alarm D OUT 59 Slave 1 Offline alarm D OUT 60 Slave 2 Offline alarm D OUT 61 Slave 3 Offline alarm D OUT 62 Alarm: Probe 1 failed or not connected D OUT 63 Alarm: Probe 2 failed or not connected D OUT 64 Alarm: Probe 3 failed or not connected D OUT 65 Alarm: Probe 4 failed or not connected D OUT 66 Alarm: Probe 5 failed or not connected D OUT 67 Alarm: Probe 6 failed or not connected D OUT 68 Alarm: Probe 7 failed or not connected D OUT 69 Alarm: Probe 8 failed or not connected D OUT 70 Condenser pump duty hours alarm D OUT 71 Compressor duty hours alarm D OUT 72 Condenser pump thermal cutout alarm D OUT 73 Clock alarm D OUT 74 Phase monitor alarm D OUT 75 Low pressure alarm from transducer D OUT 76 High voltage alarm D OUT 77 High current alarm D OUT 78 Evaporator pump duty hours alarm D OUT 79 Values inputting error D OUT 80 High delivery temperature alarm D OUT 81 Pressure differential alarm D OUT 82 Diver 1 probe alarm D OUT 83 Alarm: driver 1 EEPROM error D OUT 84 Alarm: driver 1 stepped motor valve error D OUT 85 Alarm: driver 1 battery error D OUT 86 Driver 1 high pressure alarm (MOP) D OUT 87 Driver 1 low pressure alarm (LOP) D OUT 88 Driver 1 low superheat alarm D OUT 89 Alarm - valve not shut after driver 1 black-out D OUT 90 Driver 1 high intake temperature alarm D OUT 91 Diver 2 probe alarm D OUT 92 Alarm: driver 2 EEPROM error D OUT 93 Alarm: driver 2 stepped motor valve error D OUT 94 Alarm: driver 2 battery error D OUT 95 Driver 2 high pressure alarm (MOP) D OUT 96 Driver 2 low pressure alarm (LOP) D OUT 97 Driver 2 low superheat alarm D OUT 98 Alarm - valve not shut after driver 2 black-out D OUT 99 Driver 2 high intake temperature alarm D OUT 100 Standby due to EEPROM /battery recharge / or open valve error, driver 1 D OUT 101 Standby due to EEPROM /battery recharge / or open valve error, driver 2

CAREL S.p.A. Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 Fax (+39) 049.9716600 http://www.carel.com - e-mail: [email protected]

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